When I run Crystal-C 1.4.4 I get the following error message with exit code 1:
Please check if there are MS1 spectra in raw or mzML files.
Crystal-C 1.4.2 runs successfully using the same input data and parameters, so I am guessing those are not the issue.
Because I don't see 1.4.4 published here yet, I'll add that I was originally running it via FragPipe 18.0, although I've also run the isolated java command from FragPipe with the same results.
Let me know if I can provide any further information. Thanks!