Hi,<br><br>I am trying to multiply to spares matrices. I am using PETSC_DEFAULT for the fill ratio; however, I cannot compile the code I get the following error message :<br><br>Error: master.F, line 55: This name does not have a type, and must have an explicit type. [PETSC_DEFAULT]<br> call MatMatMult(A,B,MAT_REUSE_MATRIX,PETSC_DEFAULT,C,ierr) <br>----------------------------------------------------------^<br>compilation aborted for master.F (code 1)<br><br>Thanks <br><br>Waad<br><br><p> 
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