I don’t know if it’s a real bug, but I never saw this message before 4.13, and I didn’t really change how I use my computer/UE4 … No other graphics applications are running, I didn’t change graphical level …
My video card is a GTX 760 (2gb ram) and I have 8Gb ram …
Out of video memory trying to allocate a texture! Make sure your video card has the minimum required memory, try lowering the resolution and/or closing other applications that are running. Exiting …
Does this happen when trying to open any project or only one of your old projects from a previous version? Could you provide the log for one of the instances where this happened? You should be able to find it in the project’s folder under Saved > Logs.