Dear FreeFem users,
I am trying to assemble a system from block matrices. Generally, one can create a Mat object and assign a value to it directly using the varf keyword. However, it does not seem to work for rectangular matrices. This can be demonstated by modifying the stokes-2d-SLEPc.edp example, because changing lines
matrix BLoc = vPbB(VhP, VhV);
B = BLoc;
to
B = vPbB(VhP, VhV);
results in a PETSc error. I got this result both using the recently published 4.10 version, and also by using a recent compilation of the develop branch. Is this a bug, or is there a reason why this does not work?