Thanks for providing the code.
I tried to run it after adding the path. The program was stuck though, whatever it was processing required a lot of memory. There was no error message in the command line.
The way I added the support path was: Tools, Options, Support File Search Path, Add. Added "C:\Drawing Conversion". Tried moving to the top, restarting, etc, no luck.
The only thing I could think of was adding "\\" after the "list.txt" using "strcat" ... but got an error message.
(setq pth (vl-filename-directory strcat tx1 "\\")