Dear all, I encountered a problem when I run the FieldConvert with two or more cpu cores for the C0Projection module. For example, when I run the following command, it is OK: mpirun -np 1 ./FieldConvert -m C0Projection 2D_20x20.xml 2D_20x20_0.chk 2D_20x20_0_C0.fld However, the following command will report an error: mpirun -np 2 ./FieldConvert -m C0Projection 2D_20x20.xml 2D_20x20_0.chk 2D_20x20_0_C0.fld and the error message is: gs_setup: 60 unique labels shared pairwise times (avg, min, max): 0.000110245 0.00010879 0.000111699 crystal router : 9.22918e-05 9.22918e-05 9.22918e-05 all reduce : 0.000179148 0.0001791 0.000179195 used all_to_all method: crystal router handle bytes (avg, min, max): 4724 4724 4724 buffer bytes (avg, min, max): 1920 1920 1920 CG iterations made = 5001 using tolerance of 1e-09 (error = nan, rhs_mag = inf) Fatal : Level 0 assertion violation Exceeded maximum number of iterations terminate called after throwing an instance of 'ErrorUtil::NekError' what(): Level 0 assertion violation Exceeded maximum number of iterations Can anyone help me about this? Best Jian