The following cook error results from attempting to package a WP map that has level instances using level BPs:
LogCook: Error: PackageSplitter found the Generator package still in
memory after it should have been deleted by GC.
UATHelper: Cooking (Windows): This is unexpected since garbage has been collected and the package
should have been unreferenced so it should have been collected, and will break population of
Generated packages.
LogWindows: Error: begin: stack for UAT LogWindows: Error: === Critical error: === LogWindows: Error: LogWindows: Error: Assertion failed: FindObject<UPackage>(nullptr, *InPackage->GetName()) [File:F:\Build\UE5-Main\Engine\Source\Runtime\Engine\Private\WorldPartition\WorldPartitionLevelHelper.cpp] [Line: 170] LogWindows: Error: LogWindows: Error: LogWindows: Error: LogWindows: Error: [Callstack] 0x00007ffb7c14019f UnrealEditor-Engine.dll!FWorldPartitionLevelHelper::CreateEmptyLevelForRuntimeCell() [F:\Build\UE5-Main\Engine\Source\Runtime\Engine\Private\WorldPartition\WorldPartitionLevelHelper.cpp:170] LogWindows: Error: [Callstack] 0x00007ffb7c1bad86 UnrealEditor-Engine.dll!UWorldPartitionRuntimeLevelStreamingCell::PopulateGeneratedPackageForCook() [F:\Build\UE5-Main\Engine\Source\Runtime\Engine\Private\WorldPartition\WorldPartitionRuntimeLevelStreamingCell.cpp:206] LogWindows: Error: [Callstack] 0x00007ffb785d97e0 UnrealEditor-UnrealEd.dll!UCookOnTheFlyServer::TryPopulateGeneratedPackage() [F:\Build\UE5-Main\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2642] LogWindows: Error: [Callstack] 0x00007ffb785b173d UnrealEditor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageInQueue() [F:\Build\UE5-Main\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2242] LogWindows: Error: [Callstack] 0x00007ffb785bf87e UnrealEditor-UnrealEd.dll!UCookOnTheFlyServer::PumpLoads() [F:\Build\UE5-Main\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2094] LogWindows: Error: [Callstack] 0x00007ffb785d78fb UnrealEditor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [F:\Build\UE5-Main\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1203] LogWindows: Error: [Callstack] 0x00007ffb783965d9 UnrealEditor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [F:\Build\UE5-Main\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:1010] LogWindows: Error: [Callstack] 0x00007ffb783b84bc UnrealEditor-UnrealEd.dll!UCookCommandlet::Main() [F:\Build\UE5-Main\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:688] LogWindows: Error: [Callstack] 0x00007ff795b38ec1 UnrealEditor-Cmd.exe!FEngineLoop::PreInitPostStartupScreen() [F:\Build\UE5-Main\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:3672] LogWindows: Error: [Callstack] 0x00007ff795b30a2d UnrealEditor-Cmd.exe!GuardedMain() [F:\Build\UE5-Main\Engine\Source\Runtime\Launch\Private\Launch.cpp:140] LogWindows: Error: [Callstack] 0x00007ff795b30cfa UnrealEditor-Cmd.exe!GuardedMainWrapper() [F:\Build\UE5-Main\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:147] LogWindows: Error: [Callstack] 0x00007ff795b33b6d UnrealEditor-Cmd.exe!LaunchWindowsStartup() [F:\Build\UE5-Main\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:283] LogWindows: Error: [Callstack] 0x00007ff795b445d4 UnrealEditor-Cmd.exe!WinMain() [F:\Build\UE5-Main\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:330] LogWindows: Error: [Callstack] 0x00007ff795b46912 UnrealEditor-Cmd.exe!__scrt_common_main_seh() [d:\a01\_work\6\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288] LogWindows: Error: [Callstack] 0x00007ffc04ab7034 KERNEL32.DLL!UnknownFunction [] LogWindows: Error: [Callstack] 0x00007ffc065a2651 ntdll.dll!UnknownFunction [] LogWindows: Error: LogWindows: Error: end: stack for UAT
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-145921 in the post.
| 20 |
| Component | UE - World Creation - Worldbuilding Tools - Level Instances |
|---|---|
| Affects Versions | 5.1 |
| Target Fix | 5.6 |
| Created | Mar 14, 2022 |
|---|---|
| Updated | Oct 11, 2024 |