GTRN silently fails
I was using the GTRN routine for a polar orbit inclined at 98 degrees. I specified the output name and hit the submit button. After about 10 seconds, I received a message the file was created, but it is not in my directory. When I run the flux routine, it cannot find the *.gtf file that was just created.
CREME96 does not properly handle polar or retrograde orbits. I believe it silently fails as you have seen. We are currently gathering support to address issues like these, but for now, I can only recommend using a prograde orbit or upload your own CREME96 files generated by an external source.