Handle invalid wellpatterns for COMPDAT. Given a deck with: ---- WELSPECS 'PROD' 'G1' 10 10 8400 'OIL' / / COMPDAT 'SOMETHINGELSE' 10 10 3 3 'OPEN' 1* 1* 0.5 / / ---- OPM will now by default abort and inform the user that no well match "SOMETHINGELSE".