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