Unreal Engine Issues

Fix iterative cooks to keep track of CookAdditionalFiles and delete them when the package file that created them is invalidated

A licensee reports they are using the CookAdditionalFilesOverride function in UObject to add files to the project. This file is properly copied into the Staging area during Packaging, and is appropr ...

Bug in StringTemplate.cpp related to modulo operator in MaterialTemplate.ush (code fix provided)

Shader Template files like MaterialTemplate.ush do not submit previous chunks when encountering a `%` character, unless that `%` character is `%s` or `% {...} `. Because the error is happening ...

Make Custom Event names start with "Event"/Fix "Event Event" issue with overridden Events

If you name an Event something like "Event Foo", overriding the event in a ChildBP gives you "Event Event Foo" To avoid this, please make Custom Event names Start with "Event" ...

Fix MM node "Yaw From Animation Blend Rate" for skeleton with root bone rotated X or Y up

[CrashReport] FBX import crash - UE4Editor_UnrealEd!TSet<TPair<unsigned int,FMeshSectionInfo>

This crash was introduced in 4.14.2, and is very similar to [Link Removed], however it is still occurring in 4.14.3 (after that fix) According to submitted crash reports, this one is not very wides ...

-binnedmalloc is broken on Linux

In 4.13 launching a linux game with -binnedmalloc will use the binned allocator. In 4.14 the command line was accidentally changed to -binnedmalloc1 while making other changes. It is still -binnedm ...

Ongoing D3D 'HUNG' crash - FD3D11Viewport::PresentChecked()

This is a new ticket for the D3D 'HUNG' crash originally reported in [Link Removed]. Some fixes were introduced in 4.14.2 that decreased the occurrences of this crash, but other cases are still ongo ...

Dirty Actors in WP lose their actor folder in the outliner (and cause warnings) on PIE

From Licensee: You can reproduce this in stock by doing the following:Make a new 5.1 project with a new WP map (it can be empty)Put some actors in some folders in the outliner and save them/reload ...

[CrashReport] ULevel::GetWorldSettings() - UMaterialInstanceThumbnailRenderer::Draw

This is a common assertion that has occurred since at least 4.14 and affected nearly 100 users. The callstack is similar to [Link Removed], which was marked fixed for 4.14. User DescriptionsUndoi ...

"Combine Meshes" Breaks Material Slot Assignment

When importing an FBX with several different meshes and multiple materials with "Combine Meshes" enabled the materials will get assigned to incorrect portions of the mesh. I've included a version o ...