how do i get rid of these "serialising behind stopper" errors?

[Amleexm1010]

sometimes when i try to open/export certain things this error comes up:
Serializing behind stopper (6CD9+4 > 6CD9)
FPakFile::Serialize: file=/Game/Character/Common_NPCs/GenericFemaleNPC/NPCFemale_Hair_Jackie.uasset <- FArchive::ByteOrderSerialize <- TArray::Serialize: 908/16842752 <- FStaticMeshLODModel4<< <- TArray::Serialize: 0/2 <- UStaticMesh4::Serialize <- LoadObject: StaticMesh4'NPCFemale_Hair_Jackie.NPCFemale_Hair_Jackie', pos=6CD9, ver=505/0 (unversioned), game=ue4.13 <- UObject::EndLoad <- LoadWholePackage: /Game/Character/Common_NPCs/GenericFemaleNPC/NPCFemale_Hair_Jackie.uasset <- CUmodelApp::ShowPackageUI <- CUmodelApp::ProcessKey: key=6F, down=1 <- VisualizerLoop <- Main: umodel_build=1544

how do i stop this error?

[gildor2]

Check the forum thread about the game you're trying to open.