<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"><base href="x-msg://1720/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Tobias, <div>I've just had a look at your problem.</div><div><br></div><div>I've detected to problems in your coupled formulation:</div><div>1) You should not split the Equation part in the formulation. This is done implicitly by GetDP when you have two different test functions.</div><div>2) You have to define two different basis functions, one for p and the other one for pF.</div><div><br></div><div>I attach a working file with this modifications.</div><div><br></div><div>Best regards,</div><div>Ruth</div><div><br></div><div></div></body></html>