Just started using the program FullProf4Mac for Rietveld refinement.

I watched a few videos on YouTube and downloaded fullprof for Mac it asked to install XQuartz, did that. Both are the latest versions

I made a folder with the .cif and .dat file

In EDPCR, I loaded the .cif file, made the required arrangements (phase, refinement etc)

save and run

what I got was a message,  "Re-load PCR file?"

I select 'yes'

I get a message "ERROR: You are trying to perform a calculation of intensities without atoms for phase 1 Introduce atoms or, if you have experimental data, just do a Profile Matching refinement!!!"

Tried most of the fixes (both files in same folder, using older versions, disable firewall ) and nothing worked.

I noticed that the .pcr file was created when I clicked  ‘save’ but when I clicked ‘run’ all the above error messages appeared.

Please,any help would be appreciated.

( I use a 2017 MacBook Air ,with OS Monterey)

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