Hi Epic.
I’m having a variation of This problem, I was getting same message ( one mentioned in original post), and not being able to save blueprint, consistently. problem started after I moved a blueprint (BP_Extractor02) into a subfolder. I’ve done this before and references remain intact thanks to redirectors, but after moving this blueprint, my main player blueprint, which was referencing it, started giving me that error when attempting to save.
I opened reference viewer and saw that it was still trying to reference BP_Extractor02 in its original location, but only place it was referenced in player blueprint was a struct in construction script.
Unfortunately, a make-struct doesn’t seem to have ability to choose directory path, and just shows class (BP_Extractor02 with no indication of where that class is stored), so I had to trust that it was pointing in right direction. All blueprints compiled correctly, but player blueprint still wouldn’t save.
Now editor crashes on startup. Crash report:
MachineId:B78EDE364932DE971544F6A1D5BC2209
EpicAccountId:6086868679774b65b64f001dd89772ce
Unknown exception - code 00000001 (first/second chance not available)
Assertion failed: BlueprintObj->GeneratedClass [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Editor\UnrealEd\Private\Kismet2\Kismet2.cpp] [Line: 896]
Invalid generated class for StructureFunctionLibrary
KERNELBASE + 37901 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FOutputDevice::Logf__VA() + 248 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor_Core!FDebug::AssertFailed() + 1079 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:224]
UE4Editor_UnrealEd!FKismetEditorUtilities::RecompileBlueprintBytecode() + 237 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:896]
UE4Editor_Engine!UBlueprintGeneratedClass::ConditionalRecompileClass() + 199 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\blueprintgeneratedclass.cpp:247]
UE4Editor_CoreUObject!FScopedClassDependencyGather::~FScopedClassDependencyGather() + 97 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:133]
UE4Editor_CoreUObject!ULinkerLoad::CreateExport() + 5855 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3612]
UE4Editor_CoreUObject!ULinkerLoad::IndexToObject() + 152 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3804]
UE4Editor_CoreUObject!ULinkerLoad::CreateExport() + 3505 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3329]
UE4Editor_CoreUObject!ULinkerLoad::CreateExportAndPreload() + 27 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2520]
UE4Editor_CoreUObject!ULinkerLoad::LoadAllObjects() + 603 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2628]
UE4Editor_CoreUObject!LoadPackageInternal() + 2055 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:896]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 1195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2213]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 2153 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2261]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::Verify() + 807 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1768]
UE4Editor_CoreUObject!ULinkerLoad::FinalizeCreation() + 432 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1674]
UE4Editor_CoreUObject!ULinkerLoad::Tick() + 336 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:634]
UE4Editor_CoreUObject!ULinkerLoad::CreateLinker() + 111 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:382]
UE4Editor_CoreUObject!GetPackageLinker() + 2546 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linker.cpp:668]
UE4Editor_CoreUObject!LoadPackageInternal() + 1567 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:833]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 1195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2213]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 2153 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2261]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::Verify() + 807 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1768]
UE4Editor_CoreUObject!ULinkerLoad::FinalizeCreation() + 432 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1674]
UE4Editor_CoreUObject!ULinkerLoad::Tick() + 336 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:634]
UE4Editor_CoreUObject!ULinkerLoad::CreateLinker() + 111 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:382]
UE4Editor_CoreUObject!GetPackageLinker() + 2546 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linker.cpp:668]
UE4Editor_CoreUObject!LoadPackageInternal() + 1567 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:833]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 1195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2213]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 2153 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2261]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::Verify() + 807 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1768]
UE4Editor_CoreUObject!ULinkerLoad::FinalizeCreation() + 432 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1674]
UE4Editor_CoreUObject!ULinkerLoad::Tick() + 336 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:634]
UE4Editor_CoreUObject!ULinkerLoad::CreateLinker() + 111 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:382]
UE4Editor_CoreUObject!GetPackageLinker() + 2546 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linker.cpp:668]
UE4Editor_CoreUObject!LoadPackageInternal() + 1567 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:833]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 1195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2213]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 2153 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2261]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::Verify() + 807 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1768]
UE4Editor_CoreUObject!ULinkerLoad::FinalizeCreation() + 432 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1674]
UE4Editor_CoreUObject!ULinkerLoad::Tick() + 336 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:634]
UE4Editor_CoreUObject!ULinkerLoad::CreateLinker() + 111 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:382]
UE4Editor_CoreUObject!GetPackageLinker() + 2546 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linker.cpp:668]
UE4Editor_CoreUObject!LoadPackageInternal() + 1567 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:833]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 1195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2213]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImportInner() + 2153 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2261]
UE4Editor_CoreUObject!ULinkerLoad::VerifyImport() + 195 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1978]
UE4Editor_CoreUObject!ULinkerLoad::Verify() + 807 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1768]
UE4Editor_CoreUObject!ULinkerLoad::FinalizeCreation() + 432 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1674]
UE4Editor_CoreUObject!ULinkerLoad::Tick() + 336 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:634]
UE4Editor_CoreUObject!ULinkerLoad::CreateLinker() + 111 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:382]
UE4Editor_CoreUObject!GetPackageLinker() + 2546 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\linker.cpp:668]
UE4Editor_CoreUObject!LoadPackageInternal() + 1567 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:833]
UE4Editor_UnrealEd!UEditorEngine::Map_Load() + 5034 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editorserver.cpp:2245]
UE4Editor_UnrealEd!UEditorEngine::HandleMapCommand() + 349 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editorserver.cpp:5680]
UE4Editor_UnrealEd!UEditorEngine::Exec() + 797 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editorserver.cpp:5180]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() + 273 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedsrv.cpp:742]
UE4Editor_UnrealEd!FEditorFileUtils::LoadMap() + 789 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\filehelpers.cpp:1910]
UE4Editor_UnrealEd!FEditorFileUtils::LoadDefaultMapAtStartup() + 216 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\filehelpers.cpp:3070]
UE4Editor_UnrealEd!FUnrealEdMisc::OnInit() + 2263 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedmisc.cpp:299]
UE4Editor_UnrealEd!EditorInit() + 3254 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealed.cpp:86]
UE4Editor!GuardedMain() + 926 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:133]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
If I can get editor opening again, I may be able to fix “transient” problem, as other post referenced.
Please help!