I am using MAT273 CDPM for tensile strength test for fiber concrete, after running my simulation the error message comes up in like 2mins. I have tried few tricks but it seems the error message is not yet ready to go anywhere. Can anyone help please?

*** Error 40509 (SOL + 509) negative volume in solid element #6701 cycle 14509 negative volume in solid element #6702 cycle 14509 negative volume in solid element #6781 cycle 14509 negative volume in solid element #6782 cycle 14509 negative volume in solid element #6941 cycle 14509 negative volume in solid element #6942 cycle 14509 14509 t8.9970E-03 dt1.10E-09 write d3plot file 02/21/23 11:41:24 14509 t8.9970E-03 dt1.10E-09 write d3plot file 02/21/23 11:41:24 Error termination 0221/23 11:41:24