Black Mesa Tools Help

Hello all! Just bought the game and I’m wanting to port some of my favorite SP mods over to retail.

Sadly, whenever I try to open hammer.exe, hlmv, or any of the tools I get - “Windows cannot access the specified device, path, or file. You may not have the appropriate permission to access the item.”

This happens no matter what I do, run as admin or what.

Any Ideas?

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.