Unreal Engine Issues

Opening a widget blueprint on Linux causes editor to crash

The editor crashes when attempting to open a widget blueprint. ...

Crash when AnimBlueprint and Bleuprint Interface has Same Name Function

When AnimBP and Blueprint Interface was added to the AnimBP has same name function, compiling AnimBP occur crash. ...

Crash when enabling Shader Complexity Viewmode

Material Editor Assertion Crash When Collapsing Material Attributes

Collapsed material attribute nodes cause an editor assertion crash in the material editor when viewed or opened. Assertion failed: (Index >= 0) & (Index < ArrayNum): Array index out of bounds: 0 fr ...

Crash occurs while attempted to drag and drop an asset from Bridge while it is docked to the Sidebar

An Assertion is thrown while attempting to drag and drop an asset from Bridge while it is docked to the Sidebar ...

Crash When Setting a Bool in a Niagara Parameter Collection via Blueprint

The Editor will crash when setting a bool in a Niagara Parameter Collection via Blueprint. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5159901, 4.23 CL# 5194133 ...

Crash when using the Blueprint merge tool

The Editor crashes when merging a change using the Blueprint Merge tool on Linux.  ...

Crashes occur when executing MRQ while adding UMG with RetainerBox.

Create an asset containing a RetainerBox in UMG, then add the created UMG to the viewport using AddViewport. Running MRQ after this causes a crash. ...

Crash when Background Blur is added with Instanced Stereo enabled

BP - Nativization will fail at cook time if a BP class and a User-Defined Structure reference each other.

Note: This happens with "Exclusive" nativization mode as well. This occurs because the nativized UDS 'GetDefaultValue()' method is generated into a .h file rather than a .cpp file. This creates a c ...