[TWEAK][B1877] CTDs

[Knightpawn]

While in double flame I am getting random CTDs in the last built (which is otherwise quite nice as a game experience). I have not discerned a pattern when they happen and as a result I am not sure what to upload as reference material. Any guidance welcomed

[Raptorx7_slith]

Send a scenario where it reliably happens

[Knightpawn]

To be sure: It is not "reliable" in the sense that it occurs, say, once in a 2 hrs session. Seldom but it does happen. I dont remember it happing before. Do you wish the exceptions log as well?

[blu3s]

Yes please, also check the event viewer log, there might be some information there about the crashes related to Command

[Nikel]

To be sure: It is not "reliable" in the sense that it occurs, say, once in a 2 hrs session. Seldom but it does happen. I dont remember it happing before. Do you wish the exceptions log as well?

In your scenario I had CTDs when fighting the swarm.

Random and nothing in the event viewer.

[Lakeend]

To be sure: It is not "reliable" in the sense that it occurs, say, once in a 2 hrs session. Seldom but it does happen. I dont remember it happing before. Do you wish the exceptions log as well?

In your scenario I had CTDs when fighting the swarm.

Random and nothing in the event viewer.

I have had few CTD is in "Air Sea Battle 2027" and it does not indeed anything in the logs when it crashes.

[Knightpawn]

CTDs keep appearing slightly more frequently in 1877. While unable to spot a consistent pattern at least two of them happened when an enemy unit was destroyed (first a sub, then an a/c)

[Knightpawn]

[UPDATE] I think I have a pattern. CTDs occur when in double flame I press space to freeze / restart the time. Not each time when I use space. But pressing space seems like a necessary condition for the CTD

[Nikel]

I got one CTD, this time with message. The CTD happens after clicking on OK.


Fighting the swarm in Knightpawn's scenario as commented above, in the save uploaded and running at double flame.

Note that it may happen or not, with or without message, and the moment is variable.

Also destroying the swarm may take a while.

CTD.png (60.48 KiB) Viewed 481 times

CTD2.png (11.05 KiB) Viewed 481 times

[Dimitris]

I am very persistently trying to reproduce this CTD on B1877, without success so far.

1) Is anyone else able to reproduce this?

2) Is this CTD happening specifically on this scenario, or also others? If yes, which others?

[Nikel]

Sorry, you mean the file uploaded by Knightpawn? Do I create another thread with the .NET CTD?

I just had another CTD, and this exception in the log.

16-06-2026 14:28:08 -- BBuild 1877 -- Attempted to read or write protected memory. This is often an indication that other memory is corrupt. -- Scen : Operation Epic Fury, 2026 -- DB : -- Exception: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Stack Trace: at DirectN.ID2D1SimplifiedGeometrySink.AddLines(D2D_POINT_2F[] points, Int32 pointsCount)
at wQGOCHgEBMoSTUqusFsu.ELQheSjyCw2(Object , D2D_POINT_2F[] , Int32 , wQGOCHgEBMoSTUqusFsu )
at DXRenderer.Main.nU1CvaQPknb(Point[] )
at DXRenderer.Main.oRpCvGdOBxN(List`1 )
at DXRenderer.Main.NuUCvDFYi4m(List`1 )
at DXRenderer.Main.DrawCombinedPolygon(List`1 polygons, Color color, Single thickness, Boolean dashed)
at Command.MainForm.JBtrGZ9ERl(List`1 , Color , Single , Boolean )
at Command.MainForm.hgZrDQDfJX(List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 )
at Command.MainForm.CL_DrawRangeSymbols(Side CurrentSide)
Call Stack & Error details:
Error at 200207: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

The DirectN file or the interaction of it with CMO is creating problems, I have seen another similar line in the logs in several scenarios and versions of CMO.

22-05-2026 23:22:31 -- BBuild 1868 -- Attempted to read or write protected memory. This is often an indication that other memory is corrupt. -- Scen : Operation Rite of Passage -- DB : -- Exception: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Stack Trace: at DirectN.ID2D1GeometryGroup.Outline(IntPtr worldTransform, Single flatteningTolerance, ID2D1SimplifiedGeometrySink geometrySink)
at xbumiKG8PGCVo4agK25W.iFU5JtE7uGR(Object , IntPtr , Single , ID2D1SimplifiedGeometrySink , xbumiKG8PGCVo4agK25W )
at DXRenderer.Main.qrMqMI4hES8(List`1 )
at DXRenderer.Main.O64qM1mKNQ0(List`1 )
at DXRenderer.Main.DrawCombinedPolygon(List`1 polygons, Color color, Single thickness, Boolean dashed)
at Command.MainForm.BOHwNo1jWV(List`1 , Color , Single , Boolean )
at Command.MainForm.nlPweF4BMC(List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 )
at Command.MainForm.CL_DrawRangeSymbols(Side CurrentSide)
Call Stack & Error details:
Error at 200207: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

[turmoil]

I am very persistently trying to reproduce this CTD on B1877, without success so far.

1) Is anyone else able to reproduce this?

2) Is this CTD happening specifically on this scenario, or also others? If yes, which others?

I had 2-3 CTDs recently across a couple of scenarios - one of which I recall was Transient's Somalian Soiree 2031 from the workshop. I can second Knightpawn's comment about it seemingly only happening at high time acceleration when pressing space to pause/unpause. No idea how to reproduce it as it only happened every couple of hours and I tend to pause a lot, but it doesn't seem like an intensive scenario is necessary.

[Dimitris]

Sorry, you mean the file uploaded by Knightpawn? Do I create another thread with the .NET CTD?

I just had another CTD, and this exception in the log.

16-06-2026 14:28:08 -- BBuild 1877 -- Attempted to read or write protected memory. This is often an indication that other memory is corrupt. -- Scen : Operation Epic Fury, 2026 -- DB : -- Exception: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Stack Trace: at DirectN.ID2D1SimplifiedGeometrySink.AddLines(D2D_POINT_2F[] points, Int32 pointsCount)
at wQGOCHgEBMoSTUqusFsu.ELQheSjyCw2(Object , D2D_POINT_2F[] , Int32 , wQGOCHgEBMoSTUqusFsu )
at DXRenderer.Main.nU1CvaQPknb(Point[] )
at DXRenderer.Main.oRpCvGdOBxN(List`1 )
at DXRenderer.Main.NuUCvDFYi4m(List`1 )
at DXRenderer.Main.DrawCombinedPolygon(List`1 polygons, Color color, Single thickness, Boolean dashed)
at Command.MainForm.JBtrGZ9ERl(List`1 , Color , Single , Boolean )
at Command.MainForm.hgZrDQDfJX(List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 )
at Command.MainForm.CL_DrawRangeSymbols(Side CurrentSide)
Call Stack & Error details:
Error at 200207: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

The DirectN file or the interaction of it with CMO is creating problems, I have seen another similar line in the logs in several scenarios and versions of CMO.

22-05-2026 23:22:31 -- BBuild 1868 -- Attempted to read or write protected memory. This is often an indication that other memory is corrupt. -- Scen : Operation Rite of Passage -- DB : -- Exception: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Stack Trace: at DirectN.ID2D1GeometryGroup.Outline(IntPtr worldTransform, Single flatteningTolerance, ID2D1SimplifiedGeometrySink geometrySink)
at xbumiKG8PGCVo4agK25W.iFU5JtE7uGR(Object , IntPtr , Single , ID2D1SimplifiedGeometrySink , xbumiKG8PGCVo4agK25W )
at DXRenderer.Main.qrMqMI4hES8(List`1 )
at DXRenderer.Main.O64qM1mKNQ0(List`1 )
at DXRenderer.Main.DrawCombinedPolygon(List`1 polygons, Color color, Single thickness, Boolean dashed)
at Command.MainForm.BOHwNo1jWV(List`1 , Color , Single , Boolean )
at Command.MainForm.nlPweF4BMC(List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 , List`1 )
at Command.MainForm.CL_DrawRangeSymbols(Side CurrentSide)
Call Stack & Error details:
Error at 200207: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Thank you, that is quite helpful. We will attempt to "harden" these sections for the next update.

[Nikel]

Another CTD, no message on the screen, nothing in the Event viewer.


This exception in the log. Cannot provide a save, just running at double flame, the only order to the subs was to move at flank speed.

But I cannot reproduce it.

25-06-2026 14:46:37 -- BBuild 1877 -- Object reference not set to an instance of an object. -- Scen : Operation Liberty Dawn [Redux Redux] -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at System.Collections.Concurrent.ConcurrentDictionary`2.AcquireLocks(Int32 fromInclusive, Int32 toExclusive, Int32& locksAcquired)
at System.Collections.Concurrent.ConcurrentDictionary`2.get_Count()
at Command_Core.Submarine_Kinematics.Move(Single elapsedTime, Boolean CheckForMinimumSafeHeight, Boolean SimplifiedCalcs_DLZ, DateTime ExplicitDateTime, Boolean GhostMovement)
Call Stack & Error details:
Error at 100836:

[Knightpawn]

Another CTD, no message on the screen, nothing in the Event viewer.


This exception in the log. Cannot provide a save, just running at double flame, the only order to the subs was to move at flank speed.

But I cannot reproduce it.

Did you notice if you pressed space to pause - unpause? For my case this is clearly the trigger when it happens

[Nikel]

I never press the hotkey, always the button on the top left with the mouse.

But I do not think I was pausing/unpausing the simulation.

Can you search for this exception in the logs folder?

Notepad++ is very useful for this. Search...Find in files.


This is the first time this exception happens here.

Command_Core.Submarine_Kinematics.Move

[Nikel]

NFZ Baltic, 2022 is another scenario prone to cause CMO CTDs. 6 this morning.

Also fuse exceptions, can post a save, but nothing is reproducible, is random.

CTDs.png (45.64 KiB) Viewed 196 times

[Knightpawn]

May be anecdotal, but for me CTDs are less frequent in 1892 while still associated with pressing spacebar to pause game running in double flame.

[Nikel]

May be anecdotal, but for me CTDs are less frequent in 1892 while still associated with pressing spacebar to pause game running in double flame.

May you look for them in the reliability monitor?

Click on the white cross with red circle each day you have one of those crosses.

What do you see in the technical details?


ChatGPT on how to run the reliability monitor.

Method 1: Run command (fastest)
Press Windows key + R

Type:

perfmon /rel
Press Enter



Method 2: From Control Panel
Open Control Panel
Go to System and Security
Select Security and Maintenance
Expand Maintenance
Click View reliability history



Method 3: Search
Press the Windows key

Search for:

Reliability Monitor

or

View reliability history
Open the result.

Reliability Monitor shows a timeline of application crashes, Windows errors, hardware failures, and updates, with a stability score from 1–10.

[Nikel]

Here is a save of the scenario in question, 2 CTDs in 2 tries today with this save. Run at double flame.

The russian side just started the attack, NATO tries to defend, as a result a lot of missiles are in the air. The simulation is slow and CMO may be unresponsive, at least in my laptop.

When you load it there are 2 grey lines, that I do not know from where they came from, they will disappear when you start the simulation.

The message of defeat and end of scenario will appear, but you have to continue, the CTD could happen later, it may take a while.



Exceptions in the log in the first CTD, all of them just 1 time.

08-07-2026 12:20:59 -- Bv1.10 Beta - Build 1892 -- Destination array was not long enough. Check destIndex and length, and the array's lower bounds. -- Scen : Baltic-22 -- DB : -- Exception: Destination array was not long enough. Check destIndex and length, and the array's lower bounds.
Stack Trace: at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length, Boolean reliable)
at Command_Core.Aircraft_AI.NeedToCrank()
Call Stack & Error details:
Error at 100389:

08-07-2026 12:21:18 -- Bv1.10 Beta - Build 1892 -- Destination array was not long enough. Check destIndex and length, and the array's lower bounds. -- Scen : Baltic-22 -- DB : -- Exception: Destination array was not long enough. Check destIndex and length, and the array's lower bounds.
Stack Trace: at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length, Boolean reliable)
at System.Collections.Generic.List`1.CopyTo(T[] array, Int32 arrayIndex)
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at Command_Core.Side.WeaponSalvosFromThisUnitToAnyTarget(ActiveUnit& theAttacker)
Call Stack & Error details:
Error at 200555: Destination array was not long enough. Check destIndex and length, and the array's lower bounds.

08-07-2026 12:25:07 -- Bv1.10 Beta - Build 1892 -- Attempted to read or write protected memory. This is often an indication that other memory is corrupt. -- Scen : Baltic-22 -- DB : -- Exception: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Stack Trace: at DirectN.ID2D1GeometryGroup.Outline(IntPtr worldTransform, Single flatteningTolerance, ID2D1SimplifiedGeometrySink geometrySink)
at HO56tyQHXY1u8LAImTk4.Cvw11DVDImG(Object , IntPtr , Single , ID2D1SimplifiedGeometrySink , HO56tyQHXY1u8LAImTk4 )
at DXRenderer.Main.cn4DOWiEyqo(List`1 )
Call Stack & Error details:
Error at 34905683476940356843908750968: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

08-07-2026 12:25:16 -- Bv1.10 Beta - Build 1892 -- Object reference not set to an instance of an object. -- Scen : Baltic-22 -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at Command_Core.Ship.CanMoveToThisLocation(Double theLat, Double theLon, Int32& MovementCost, Boolean IsPathfindingQuery, Boolean UsePathfindingBufferDistance, Boolean IgnoreMinesBehindUs, Boolean& CheckNoNavZones, Boolean CheckForIcepack, Boolean& CheckForMines, Nullable`1 DistanceFromUnit, Nullable`1 ProvidedElevation, List`1& ProvidedPiers, Single ProximityThreshold_Deg, Boolean CheckIfTargetIsOutsideProsecutionArea, Boolean CheckDistanceToNoNavZones, String& UserFeedback, Boolean& AllowBounce)
Call Stack & Error details:
Error at 200285: Object reference not set to an instance of an object.

Exceptions in the log in the second CTD, the first one 4 times.

08-07-2026 12:29:23 -- Bv1.10 Beta - Build 1892 -- Destination array was not long enough. Check destIndex and length, and the array's lower bounds. -- Scen : Baltic-22 -- DB : -- Exception: Destination array was not long enough. Check destIndex and length, and the array's lower bounds.
Stack Trace: at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length, Boolean reliable)
at System.Collections.Generic.List`1.CopyTo(T[] array, Int32 arrayIndex)
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at Command_Core.Side.WeaponSalvosFromThisUnitToAnyTarget(ActiveUnit& theAttacker)
Call Stack & Error details:
Error at 200555: Destination array was not long enough. Check destIndex and length, and the array's lower bounds.


08-07-2026 12:29:27 -- Bv1.10 Beta - Build 1892 -- Destination array was not long enough. Check destIndex and length, and the array's lower bounds. -- Scen : Baltic-22 -- DB : -- Exception: Destination array was not long enough. Check destIndex and length, and the array's lower bounds.
Stack Trace: at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length, Boolean reliable)
at System.Collections.Generic.List`1.CopyTo(T[] array, Int32 arrayIndex)
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Command_Core.ActiveUnit_Weaponry.ReloadMounts()
Call Stack & Error details:
Error at 100318:


08-07-2026 12:33:34 -- Bv1.10 Beta - Build 1892 -- Object reference not set to an instance of an object. -- Scen : Baltic-22 -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at System.String.Concat(String str0, String str1, String str2, String str3)
at v1FjOY1Q1oRkw7nysbFG.Cvw11DVDImG(String , String , String , String , v1FjOY1Q1oRkw7nysbFG )
at Command_Core.Ship.CanMoveToThisLocation(Double theLat, Double theLon, Int32& MovementCost, Boolean IsPathfindingQuery, Boolean UsePathfindingBufferDistance, Boolean IgnoreMinesBehindUs, Boolean& CheckNoNavZones, Boolean CheckForIcepack, Boolean& CheckForMines, Nullable`1 DistanceFromUnit, Nullable`1 ProvidedElevation, List`1& ProvidedPiers, Single ProximityThreshold_Deg, Boolean CheckIfTargetIsOutsideProsecutionArea, Boolean CheckDistanceToNoNavZones, String& UserFeedback, Boolean& AllowBounce)
Call Stack & Error details:
Error at 200285: Object reference not set to an instance of an object.

Fuse exceptions yesterday that could not reproduce, playing this same scenario. The same one but with different numbers.

07-07-2026 11:02:31!!!WARNING!!! EXCEPTION FUSE REACHED (x20 exceptions) FOR : -- Bv1.10 Beta - Build 1892 -- Object reference not set to an instance of an object. -- Scen : Baltic-22 -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at Command_Core.ActiveUnit_Weaponry.CreateSalvo(Contact theTarget, Int32 theWeaponDBID, Int32 theWeaponQty, Boolean IsManual, Nullable`1& GunStrafingSalvo, DateTime theScheduledTime, Boolean CreatingSalvoForPalletWeapon, Boolean CreatingSalvoForPallettizedWeapon, Boolean RebuildSalvoCache, Boolean GenerateFiringProposal, Boolean supplementingShootersOutOfAmmo, Boolean IsSelfDefence, String SalvoTag)
Call Stack & Error details:
Error at 52755545544541:

07-07-2026 11:02:31!!!WARNING!!! EXCEPTION FUSE REACHED (x20 exceptions) FOR : -- Bv1.10 Beta - Build 1892 -- Object reference not set to an instance of an object. -- Scen : Baltic-22 -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at Command_Core.ActiveUnit_Weaponry.CreateSalvo(Contact theTarget, Int32 theWeaponDBID, Int32 theWeaponQty, Boolean IsManual, Nullable`1& GunStrafingSalvo, DateTime theScheduledTime, Boolean CreatingSalvoForPalletWeapon, Boolean CreatingSalvoForPallettizedWeapon, Boolean RebuildSalvoCache, Boolean GenerateFiringProposal, Boolean supplementingShootersOutOfAmmo, Boolean IsSelfDefence, String SalvoTag)
Call Stack & Error details:
Error at 245252625257:


07-07-2026 11:02:31!!!WARNING!!! EXCEPTION FUSE REACHED (x20 exceptions) FOR : -- Bv1.10 Beta - Build 1892 -- Object reference not set to an instance of an object. -- Scen : Baltic-22 -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at Command_Core.ActiveUnit_Weaponry.CreateSalvo(Contact theTarget, Int32 theWeaponDBID, Int32 theWeaponQty, Boolean IsManual, Nullable`1& GunStrafingSalvo, DateTime theScheduledTime, Boolean CreatingSalvoForPalletWeapon, Boolean CreatingSalvoForPallettizedWeapon, Boolean RebuildSalvoCache, Boolean GenerateFiringProposal, Boolean supplementingShootersOutOfAmmo, Boolean IsSelfDefence, String SalvoTag)
Call Stack & Error details:
Error at 321354687351:


07-07-2026 11:02:31!!!WARNING!!! EXCEPTION FUSE REACHED (x20 exceptions) FOR : -- Bv1.10 Beta - Build 1892 -- Object reference not set to an instance of an object. -- Scen : Baltic-22 -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at Command_Core.ActiveUnit_Weaponry.CreateSalvo(Contact theTarget, Int32 theWeaponDBID, Int32 theWeaponQty, Boolean IsManual, Nullable`1& GunStrafingSalvo, DateTime theScheduledTime, Boolean CreatingSalvoForPalletWeapon, Boolean CreatingSalvoForPallettizedWeapon, Boolean RebuildSalvoCache, Boolean GenerateFiringProposal, Boolean supplementingShootersOutOfAmmo, Boolean IsSelfDefence, String SalvoTag)
Call Stack & Error details:
Error at 35478413241: