"AI Move to" not working - please help!

[SneakyBrian]

Firstly, thanks for making a great plugin! I'm a beginner with UE5 but managed to get good results in just a few days.

I've got my dungeon setup fine based on the first person template with mission graph, doors, keys, etc. I've also added in spawning enemy's, and implemented basic "follow" AI using this tutorial: https://youtu.be/sVV32qivy1A?si=ymmHzY2_GckwMnIA

I've added debug messages, and can see that the enemy can "see" me and tries to move, but the "AI Move to" continually fails with "Abort".

Any ideas, tips or hints? Would you consider creating a YouTube tutorial showing how to add AI enemies to the dungeon?

I haven't purchased the plugin from the marketplace yet, but I definitely will as I want to use the minimap, but I just want to get some basic AI working first.

Many thanks!

[shun126]

When generating a dungeon at runtime, it’s necessary to update the navigation mesh after the dungeon is generated. Please check the Runtime Generation settings of the RecastNavMesh. By changing this from Static to Dynamic, the navigation mesh will be rebuilt. It can also be updated via Blueprint after BeginPlay.

If navigation mesh generation is disabled, an error log will be displayed.

[SneakyBrian]

Thank you so much for your reply. Sadly, I already have that option set:

Looking at the Output log, I see this message:

Full log here

DungeonGeneratorLogger: version '1.0.0', license 'GPL v3', uuid '3da61b40-1fba-7757-b07f-110de2a901e3', commit 'UNDEFINED COMMIT'
DungeonGeneratorLogger: generation start: Synchronize RandomSeed x=5ed3fac2, y=f8c56956, z=c3fce483, w=1dc7c0c7, CRC32=ffffffff, Server
DungeonGeneratorLogger: generation start:       Local RandomSeed x=68120f3e, y=8b13401e, z=530bf5ca, w=4f819d57, CRC32=ffffffff, Server
DungeonGeneratorLogger: GenerateRooms: 0.009796 seconds
DungeonGeneratorLogger: SeparateRooms: 0.001813 seconds
DungeonGeneratorLogger: ExpandSpace: 0.000004 seconds
DungeonGeneratorLogger: ExtractionAisles: 0.000287 seconds
DungeonGeneratorLogger: SetRoomParts: 0.000001 seconds
DungeonGeneratorLogger: AdjustedStartAndGoalSublevel: 0.000640 seconds
DungeonGeneratorLogger: InvokeRoomCallbacks: 0.000000 seconds
DungeonGeneratorLogger: Branch: 0.000007 seconds
DungeonGeneratorLogger: DetectFloorHeight: 0.000007 seconds
DungeonGeneratorLogger: MissionGraph: 0.000010 seconds
DungeonGeneratorLogger: GenerateVoxel: 0.000602 seconds
DungeonGeneratorLogger: Spawn meshes and actors: 0.153968 seconds
DungeonGeneratorLogger:   floor and slope meshes: 0.026073 seconds
DungeonGeneratorLogger:   wall meshes: 0.057331 seconds
DungeonGeneratorLogger:   roof meshes: 0.024399 seconds
DungeonGeneratorLogger:   door actors: 0.007778 seconds
DungeonGeneratorLogger: Spawn DungeonRoomSensor actors: 0.338092 seconds
DungeonGeneratorLogger: generation end  : Synchronize RandomSeed x=f4ded51e, y=87b68c04, z=5f0e8466, w=c3c81ed7, CRC32=af11c6ac, CRC32(voxel)=416e784e, Server
DungeonGeneratorLogger: generation end  :       Local RandomSeed x=f8ac00f2, y=4e5ddd53, z=89350326, w=e59b86fa, CRC32=af11c6ac, CRC32(voxel)=416e784e, Server
DungeonGeneratorLogger: Server, Remote:(GeneratedRandomSeed=66c38fce, CRC32=1cf32c80) Local:(GeneratedRandomSeed=66c38fce, CRC32=1cf32c80)
LogWorld: Bringing up level for play took: 0.546932
LogNavigation: Warning: Recreating dtNavMesh instance due mismatch in number of bytes required to store serialized maxTiles (8, 3 bits) vs calculated maxtiles (968, 10 bits)
LogOnline: OSS: Created online subsystem instance for: :Context_1
PIE: Server logged in
PIE: Play in editor total start time 0.979 seconds.
LogAudio: Warning: Detected orphaned looping sound 'BackgroundSound_Cue'.
LogBlueprintUserMessages: [BP_Pickup_Rifle_C_0] Picked Up Gun
LogBlueprintUserMessages: [BP_Door_C_6] Need Key
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Spotted Player
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Success
LogBlueprintUserMessages: [BP_Enemy_03_C_2] AI Move Fail
LogBlueprintUserMessages: [BP_Loot01_C_2] Collected Loot!
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Spotted Player
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Aborted
LogBlueprintUserMessages: [BP_Enemy_03_C_2] AI Move Fail
LogActorFactory: Loading ActorFactory Class /Script/Engine.LevelInstance

Thank you very much for any further help you can provide.

[SneakyBrian]

Actually, I fixed that warning by enabling this setting:

So now I don't get any warnings. But still my AI doesn't move.

My enemy event graph looks like this:

Full log here

DungeonGeneratorLogger: version '1.0.0', license 'GPL v3', uuid '3da61b40-1fba-7757-b07f-110de2a901e3', commit 'UNDEFINED COMMIT'
DungeonGeneratorLogger: generation start: Synchronize RandomSeed x=5a399cab, y=f483c3d7, z=5609cf4a, w=95810b45, CRC32=ffffffff, Server
DungeonGeneratorLogger: generation start:       Local RandomSeed x=467f9282, y=99a0b622, z=a3d35bf6, w=ee993323, CRC32=ffffffff, Server
DungeonGeneratorLogger: GenerateRooms: 0.009750 seconds
DungeonGeneratorLogger: SeparateRooms: 0.002177 seconds
DungeonGeneratorLogger: ExpandSpace: 0.000001 seconds
DungeonGeneratorLogger: ExtractionAisles: 0.000117 seconds
DungeonGeneratorLogger: SetRoomParts: 0.000001 seconds
DungeonGeneratorLogger: AdjustedStartAndGoalSublevel: 0.000803 seconds
DungeonGeneratorLogger: InvokeRoomCallbacks: 0.000000 seconds
DungeonGeneratorLogger: Branch: 0.000004 seconds
DungeonGeneratorLogger: DetectFloorHeight: 0.000001 seconds
DungeonGeneratorLogger: MissionGraph: 0.000010 seconds
DungeonGeneratorLogger: GenerateVoxel: 0.010916 seconds
DungeonGeneratorLogger: Spawn meshes and actors: 0.140526 seconds
DungeonGeneratorLogger:   floor and slope meshes: 0.024484 seconds
DungeonGeneratorLogger:   wall meshes: 0.064913 seconds
DungeonGeneratorLogger:   roof meshes: 0.025335 seconds
DungeonGeneratorLogger:   door actors: 0.006265 seconds
DungeonGeneratorLogger: Spawn DungeonRoomSensor actors: 0.015692 seconds
DungeonGeneratorLogger: generation end  : Synchronize RandomSeed x=37eac3ff, y=886e5a2f, z=d8b6e130, w=b315be27, CRC32=d0a4aa3, CRC32(voxel)=9da76f21, Server
DungeonGeneratorLogger: generation end  :       Local RandomSeed x=1920ea7f, y=3a59515e, z=8f4fb5e8, w=6eff52ae, CRC32=d0a4aa3, CRC32(voxel)=9da76f21, Server
DungeonGeneratorLogger: Server, Remote:(GeneratedRandomSeed=66c3943c, CRC32=ecdcb8f0) Local:(GeneratedRandomSeed=66c3943c, CRC32=ecdcb8f0)
LogWorld: Bringing up level for play took: 0.185180
LogOnline: OSS: Created online subsystem instance for: :Context_4
PIE: Server logged in
PIE: Play in editor total start time 0.369 seconds.
LogAudio: Warning: Detected orphaned looping sound 'BackgroundSound_Cue'.
LogBlueprintUserMessages: [BP_Door_C_9] Need Key
LogBlueprintUserMessages: [BP_Pickup_Rifle_C_0] Picked Up Gun
LogBlueprintUserMessages: [BP_Door_C_9] Need Key
LogBlueprintUserMessages: [BP_Door_C_11] Need Key
LogBlueprintUserMessages: [BP_Door_C_9] Need Key
LogBlueprintUserMessages: [BP_Key_C_2] Picked Up Key
LogBlueprintUserMessages: [BP_DG_PlayerState_C_0] Used Key
LogBlueprintUserMessages: [BP_Door_C_6] Need Key
LogBlueprintUserMessages: [BP_Key_C_1] Picked Up Key
LogBlueprintUserMessages: [BP_DG_PlayerState_C_0] Used Key
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Spotted Player
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Success
LogBlueprintUserMessages: [BP_Enemy_03_C_2] AI Move Fail
LogBlueprintUserMessages: [BP_Loot01_C_2] Collected Loot!
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Spotted Player
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Aborted
LogBlueprintUserMessages: [BP_Enemy_03_C_2] AI Move Fail
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Spotted Player
LogBlueprintUserMessages: [BP_Enemy_03_C_2] Aborted

[shun126]

I’m not sure why movement is failing.

I created a sample where the enemy uses AI Move To to chase the player. The enemy successfully tracked the player.
Please generate a dungeon in the editor and check if the enemy can move. After generating the dungeon in the editor, press the P key to check if the navigation information has been generated accurately.
If the enemy moves, then the movement part is working correctly.

If the enemy does not move, it's possible that the navigation data is incorrect, or the enemy cannot reach the player's position. It might be necessary to investigate whether the navigation information is being generated dynamically.

[SneakyBrian]

I have fixed the issue by deleting the nav mesh and re-adding it, and my AI started working straight away! I tried this before and it didn't work, but I did it again and this time it did! 🤷

Thanks again for your help with this problem.

[shun126]

I’m glad the issue was resolved. Later, I’ll review the plugin to ensure that the navigation volume updates don’t fail.