Forum Discussion
Packaging Error "class is not mapped when saving"
I periodically get a packaging error that only occurs on child blueprints. It causes an unrecoverable assertion: Assertion failed: !Export.ClassIndex.IsNull() [File:C:/OUE/Engine/Source/Runtime/...
[UPDATE] So this is definitely annoying. Will get crash when launching to device if there is a child blueprint of a blueprint referenced. Typically, you can simply realunch editor and package right away and it works. Doing work in the editor causes some kind of error to happen when packaging with a child blueprint.
As if launching to device in Unreal wasnt already pretty slow... now it susually crashed and I have to relaunch editor 😞