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thanks a lot that partially solved it

to contribute to people which might bump in this problem

1) i had deleted a dvi file corresponding to the project while cleaning the project
2) i restored the dvi file from an earlier date (outdated project dvi file)
3) auto-pst-pdf ran and worked
4) i tried ...

I have a problem with getting figures reproduced by the \matlabfig command.
Some days ago everything was working fine and I was able to run the auto-pst-pdf package using pdflatex --shell-escape option.

Whenever I try to generate everything again, the tool gets stuck on the PDFCrop tool for a ...