FCompression::UncompressMemory

Development Platform & Builds
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1

I have been getting this error more and more lately. It now starts happening when I try to build lighting in one of my scenes. I tried transferring it to a new project but it won’t even open the map. I have tried moving the content over to a new level but that crashes as well. Any help would be appreciated

Assertion failed: FCompression::UncompressMemory( Flags, Dest, Chunk.UncompressedSize, CompressedBuffer, Chunk.CompressedSize, (Padding > 0) ? true : false ) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Runtime\Core\Private\Serialization\Archive.cpp] [Line: 392] 



KERNELBASE.dll {0x000007fefd8cb3dd} + 0 bytes
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() {0x000007fee8d97c0f} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FOutputDevice::Logf__VA() {0x000007fee8c510b8} + 159 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FDebug::AssertFailed() {0x000007fee8c21e72} + 65 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FArchive::SerializeCompressed() {0x000007fee8c64bec} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!FUntypedBulkData::SerializeBulkData() {0x000007fee86aafde} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!FUntypedBulkData::LoadDataIntoMemory() {0x000007fee8689fb7} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!FUntypedBulkData::MakeSureBulkDataIsLoaded() {0x000007fee868be67} + 11 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!FUntypedBulkData::Serialize() {0x000007fee86a94c1} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Engine.dll!UTexture2D::Serialize() {0x000007fee612881c} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Engine.dll!ULightMapTexture2D::Serialize() {0x000007fee5e1289c} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!UPackage::SavePackage() {0x000007fee87c16f2} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UEditorEngine::SavePackage() {0x000007fee2c808b2} + 115 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UEditorEngine::Exec_Obj() {0x000007fee2cd36ce} + 72 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UEditorEngine::Exec() {0x000007fee2cd013b} + 18 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UUnrealEdEngine::Exec() {0x000007fee30e5aa1} + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!SaveWorld() {0x000007fee2d8f422} + 135 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!FEditorFileUtils::AutosaveMap() {0x000007fee2d47a47} + 47 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!FPackageAutoSaver::AttemptAutoSave() {0x000007fee2dc2f95} + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() {0x000007fee3148851} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!FEngineLoop::Tick() {0x000000013fb042d1} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!GuardedMain() {0x000000013faf49cc} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!GuardedMainWrapper() {0x000000013faf4a4a} + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!WinMain() {0x000000013fb065c9} + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!__tmainCRTStartup() {0x000000013fb075d9} + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
kernel32.dll {0x00000000779e5a4d} + 0 bytes
ntdll.dll {0x0000000077b1b831} + 0 bytes
ntdll.dll {0x0000000077b1b831} + 0 bytes
2

Hello AzzaMat,

It seems like this issue is project and/or asset related. Can you try converting this project to 4.9 and see if the issue persists? Please be sure to make a copy first as converting can always present further issues.

If that doesn’t solve anything, would it be possible to have a copy of your project so that I can test the issue? If you wish for the project to stay private, you can send it to me through a private message on the forums. Here is my [profile][1].

3

I will upgrade to 4.9 and see if that fixes it. Does 4.9 work with Steam and PS4 yet? I will get back to you and if it isn’t fixed I will send you a copy.

4

Upgraded to 4.9 and that did seem to resolve the problem.