caseDicts/postProcessing/surfaceRegion in OpenFOAM 4 was renamed to caseDicts/postProcessing/surfaceFieldValue OpenFOAM 6; OpenFOAM 6 requires pcorrFinal to be defined;
caseDicts/postProcessing/surfaceRegion in OpenFOAM 4 was renamed to caseDicts/postProcessing/surfaceFieldValue OpenFOAM 6; OpenFOAM 6 requires pcorrFinal to be defined;