More unexpectd GPV error issues

At the hospital where I work, I have 3 apps on one machine. They run on P10

runtime (written in P10) and have been running well without issues for
years 
(they don't run simultaneously).

Recently I was asked to put them on 5 more machines. I did so. They were 
installed exactly the same way on all 5 machines. They ran beautifully on 
three of the machines. On two of the machines, I received Unexpected GPV 
errors when printing the re****ts which is the purpose of the programs.

The Hospital uses Windows 2000 and a Novel network. I ran the programs on 
the C:\ drive (rather than network drive). They print to a network
printer. 
I am not sure I understand why some get the errors and others don't.

I don't know where to start and I am sure the IT folks won't have a clue 
about Paradox.

Craig