Unreal Engine Issues
Unreal Engine Issues
[AI] BTService_RunEQS has rare crash during OnQueryFinished
UE - AI - BehaviorTree - Nov 9, 2023The crash log shows Error: Ensure condition failed: MyMemory->RequestID != INDEX_NONE [UE5\Engine\Source\Runtime\AIModule\Private\BehaviorTree\Services\BTService_RunEQS.cpp][Line: 93]. Other logs ha ...
[AI] BehaviorTreeComponent fails to run a new tree if the current tree ends with a latent abort
UE - AI - BehaviorTree - Sep 8, 2023If a BT ends with a latent abort with another BT asset pending initialization, the BehaviorTree component will stop the tree that was aborted, but it does not start the new tree. You can check with ...
[AI] BehaviorTreeEditor crash when swapping from Behavior Tree to Blackboard view.
UE - AI - BehaviorTree - Aug 24, 2023The first time that a Behavior Tree editor window changes from the tree to the Blackboard can cause a crash if you add and remove a key from the Blackboard via a different Behavior Tree editor windo ...
[AI] BT cooldown decorator fails on initial startup
UE - AI - BehaviorTree - Aug 18, 2023BT cooldown decorators are failing on starting a game either via PIE or Standalone regardless of the fact their branches have not yet run. This is true for if the cooldown decorator checks its value ...
[AI] Editor crash when moving BT nodes if the BB has a BlackboardKeyType_Object with a null BaseClass
UE - AI - BehaviorTree - Feb 28, 2023The editor crashes if a BT is changed while its Blackboard has an Object type key with its BaseClass set to None (null). There is no warning or log alerting the user that setting the BaseClass to No ...
BlackboardComponent observer can be called for the wrong key
UE - AI - BehaviorTree - Feb 7, 2023We need to, at least, prevent this by clearing observers when running a new BT using a different blackboard. Must also think that this might affect licensees relying on the current behavior (might h ...
Nodes to the right of an Abort Both node in a Behavior Tree appears to still receive a tick
UE - AI - BehaviorTree - Feb 6, 2023This is a regression. Tested in //UE5/Release-5.0 CL20979098 Behavior Tree appears to tick nodes to the right of an aborted node that is set to abort Both. Those nodes are not executed, but visuall ...
Composite Decorator Graph nodes are not updating titles when changes are made to the properties of a node
UE - AI - BehaviorTree - May 5, 2022Composite Decorator Graph nodes are not updating titles. Upon closing and reopening the Composite Decorator Graph, the nodes do refresh to their properly set title. Repro Rate: 3/3 Tested this in ...
[AI] Behavior Tree gets stuck in an infinite loop if a Conditional Loop decorator cannot find a child node to run
UE - AI - BehaviorTree - May 4, 2022Behavior Tree can be stuck in an infinite loop with a Conditional Loop that cannot run any child nodes. Exception thrown at 0x00007FFC0E405F65 (UnrealEditor-AIModule.dll) in UnrealEditor.exe: 0xC ...
The process may not return to the root node after the Wait Task is completed.
UE - AI - BehaviorTree - Sep 14, 2021If the Wait Task is completed for the first frame, it may not return to the root node even after Finish. This can be avoided by increasing the wait time of the Wait Task (see CaseOK.mp4). When this ...