ABAQUS modeling: Warning about unconnected regions when using hypoplasticity subroutine

I ran a simple 3D model with symmetry boundary conditions first using elastic material and then as hypoplastic using a subroutine. However, in the former case, I don’t get the above warning and the job was completed. When I use the UMAT, I got warning of 197 unconnected regions and my job aborted. I don’t know whether unconnected regions is the reason for the job abortion; but I’m inquisitive to know the reason behind this warning considering it did not appear for the elastic case.