Wow.  Wasn't v3.22 released circa 1997/8.  As I recall, it was totally DOS.  Any chance you are running it on a Novell Server?  Good in your search endeavors.

Yes Running on Novell. 

Those were the days!!

G.K. I'm going to be bold and ask, why are you still using Sage 100 (MAS 90) on version 3.22, on a Novell (who's end of life was 10 years ago in 2014)?  Your running this for a professional business in calendar year 2024?  Good Luck getting anyone with that knowledge to further troubleshoot.

From the old ProvideX Language Manual:
"Error #256 (and >256): Operating System Errors
Any error message over 255 is a reported operating system error. ProvideX reports
OS errors by taking the actual OS error number and adding 256. Use the following
requests to determine what these errors are:
PRINT MSG(error#) or PRINT MSG(RET)"

What does the Info button show?  The closest thing I could find in my old notes was an Error 47 with that program.  We had to Analyze and Relink the SO6 line files.  It's not the same error but maybe worth the try...