<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear Developers,</div><div><br></div><div>I found the out of core parameter in the external solver MUMPS is important when using with cygwin because the default directory /tmp/ simply does not exist in windows. So you may consider putting:</div><div><br></div><div> ierr = PetscOptionsString("-ooc_tmpdir", "The Out of Core directory", "None", lu->id.ooc_tmpdir, lu->id.ooc_tmpdir, 256, PETSC_NULL);<br></div><div><br></div><div> in the function:</div><div><br></div><div>PetscErrorCode PetscSetMUMPSOptions(Mat F, Mat A)</div><div><br></div><div>in the file: mumps.c</div><div><br></div><div>So that the users can enter the temporary directory of their choice.<br></div><div><br></div><div>Kind regards,</div><div>Pham Van Ha<br></div><div></div></div></body></html>