I have problem to compile my .mp file with mptopdf in MikTex while with mpost it works. The log is:

MPtoPDF 1.4.1 : running 'mpost --progname=mpost --mem=metafun --tex=latex NFPL067-img.mp' ERROR: No suitable temporary directory found. ERROR: Info: ERROR: Source: Libraries\MiKTeX\Core\Session\miktex.cpp ERROR: Line: 74

Sorry, but mpost did not succeed.

You may want to visit the MiKTeX project page, if you need help.

MPtoPDF 1.4.1 : error while processing mp file

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