Dear Hong, any chance this is related to your work around commit 8b3fa1f7362a032c26473e2c80cb80f09a5a21c7
This test is working just fine with PETSc 3.5, 3.6, and 3.7, but fails with petsc/master $ git clone https://github.com/dalcinl/petiga $ cd petiga $ make $ cd test $ make IGAInputOutput $ mpiexec -n 4 valgrind -q ./IGAInputOutput -iga_dim 2 ==26589== Invalid write of size 8 ==26589== at 0x5A7B8E7: ISGetSeqIS_SameColDist_Private (mpiaij.c:3026) ==26589== by 0x5A7CFFF: MatCreateSubMatrix_MPIAIJ_SameRowColDist (mpiaij.c:3130) ==26589== by 0x5A7E1DC: MatCreateSubMatrix_MPIAIJ (mpiaij.c:3243) ==26589== by 0x5B64553: MatCreateSubMatrix (matrix.c:7894) ==26589== by 0x4E9A704: MatView_MPI_IGA (petigamat.c:75) ==26589== by 0x5B19527: MatView (matrix.c:986) ==26589== by 0x402F5D: main (IGAInputOutput.c:119) -- Lisandro Dalcin ============ Research Scientist Computer, Electrical and Mathematical Sciences & Engineering (CEMSE) Extreme Computing Research Center (ECRC) King Abdullah University of Science and Technology (KAUST) http://ecrc.kaust.edu.sa/ 4700 King Abdullah University of Science and Technology al-Khawarizmi Bldg (Bldg 1), Office # 0109 Thuwal 23955-6900, Kingdom of Saudi Arabia http://www.kaust.edu.sa Office Phone: +966 12 808-0459
