Access Violation in AssetDeleteModel.cpp when importing FBX file

Development Pipeline & Plugins
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1

Hi,

I’m on UE4.14.3 and I’m getting an access violation error when using the ImportAssets commandlet to import a simple FBX file. This is the command I’m running:

UE4Editor-Cmd.exe $UE_PROJECTFILE -run=ImportAssets -AllowCommandletRendering -source=$FBX_FILEPATH -dest=Geometry/Meshes -importsettings=$SETTINGS_JSONFILE -replaceexisting

The content of the JSON settings file is:

{
	"ImportGroups": [
		{
			"FactoryName": "/Script/UnrealEd.FbxFactory",
         "ImportSettings":
			{
            "bImportMesh": 1,
            "bImportMaterials": 1,
            "bImportTextures": 1,
            "bCombineMeshes": 0,
            "bConvertScene": 1,
            "bConvertSceneUnit": 1,
            "StaticMeshImportData":
            {
               "bAutoGenerateCollision": 0,
               "bRemoveDegenerates": 1
            },
            "SkeletalMeshImportData":
            {
            } ,    
            "AnimSequenceImportData":
            {
            }, 
            "TextureImportData":
            {
            }             
			}
		}
	]
}

The callstack for the access violation error is:

125136-importassetscrashstack.jpg
125136-importassetscrashstack.jpg1060×420 98.1 KB

After looking at the source code for a while, I found that if I set the “bCreatePhysicsAsset” settings of the ImportAssets commandlet to false, the crash no longer occurs.

If I use UE4 Editor to manually import the FBX file, I get the following message in the log but the FBX is imported OK:
“Warning The bone size is too small to create Physics Asset ‘ButterflyValve_0_PhysicsAsset’ from Skeletal Mesh ‘ButterflyValve_0’. You will have to create physics asset manually.”

Even if the issue is in the FBX file (i.e. bone size in the model), the ImportAssets commandlet should handle it gracefully and not crash like the UE Editor is doing.

Thanks,
Softavi

2

Hey Softavi,

Any chance you can send me the fbx file that you’re using? I’m having trouble reproducing this on my end. You can attach here or PM me a download link on the forums if you’d like to keep it private. Please respond here after you send it for tracking purposes.

3

Hi , it seems that I haven’t got enough permissions to PM you.

4

Hey Softavi,

We’re giving you permissions to PM. You have to have some activity on the forums to be able to PM, but we can override that.

5

Hi,

Thanks for sorting the permissions out. I’ve sent you a PM with a link to the FBX model.

I’ve tried with the latest version of UE4 (4.15) and I still get the crash with the same callstack.

Thanks

6

Hey Softavi,

Thanks for reporting this. I’ve entered UE-42334. You can track the report’s status as the issue is reviewed by our development staff. Please be aware that this issue may not be prioritized or fixed soon.