🚀 go-pugleaf

Could someone related to Lattice please advise:
I am trying to debug a graph plotting program.
One module (almost pure CBM code) saves the screen as an IFF file.
If this module is run, the machine becomes unreliable. Sometimes crashes while
running, sometimes at program exit. 
I tried compiling with catch.o and it ALWAYS crashed while running, with a
requester saying "Caught a Guru. Write to file?". Doesn't matter what you
choose, down she goes. How is this supposed to work? (doesn't write a file)

Tried Cpr. Compiled with -d2 or -d5 options link with ADDSYM load into cpr once
the symbol table is loaded, cpr quits with the error message CXERR 350.
The only reference to CXERR I could find was for LC, and it said "please
contact Lattice support staff". So I'm trying.

Thanks Alan,