Able Ability System Info and Support Thread

That doesn’t look like anything to do with Able (not sure why enabling Able would cause the UHT to choke like that). It looks like you have either A.) A Windows permissions issue (try moving your project out of your User directory and into some simple thing like C:\MyProjects or something like that ), or B.) Some zombie process is holding on to that SharedPCH file, you could try manually deleting it and see if it lets you.