Profex version 3.13, which was released just recently, has a substantially improved CIF import. It still needs manual tweaking if the CIF files are incomplete or use non-standard atomic settings, but the STR files can be verified easily and the error messages are a bit more meaningful now.
I am also working on further improvements for the next release.
Sometimes .cif files miss information that Profex requires, like Wyckoff positions. If you attach an example of a .cif file that you converted, I -or other people on research gate- can help you find the problem and solve it.
I'm facing the same problem as Mahesha M G. I can provide a converted CIF file which has the Wyckhoff positions, but still doesn't work in Profex.
I also tried to convert it with PowderCell into a STR file but that doesn't work either. However, the cif file is working perfectly within fullprof
Best regards
Christian
Quick edit: Just got the file working and it seems to be a really stupid error. When converting a cif file the "PHASE=" tag is empty. I just had an empty space after the "=" followed by the phase, however, avoid any empty spaces behind the PHASE tag and set a phase name there.
Profex version 3.13, which was released just recently, has a substantially improved CIF import. It still needs manual tweaking if the CIF files are incomplete or use non-standard atomic settings, but the STR files can be verified easily and the error messages are a bit more meaningful now.
I am also working on further improvements for the next release.