If you're using your P4 Runtime as an external Runtime you have to remember that all of the P4 content went into one Runtime.  Also, if you've moved it recently, it won't remember where all the files are because the P4 Runtime used absolute path references rather than relative path references.

My suggestion is to alway use any previous version Runtimes as an external and just leave them where they are.  I still have P4 and P5 installed for that precise reason, with the exception of the P5 runtime which is empty because P5 allowed for external runtime folders.  My P4 runtime is still in the original location so that, if I need it, everything is where the program expects it to be.

Hugz from Phoenix, USA

Victoria

Remember, sometimes the dragon wins. Correction: MOST times.