I am modelling a masonry arch bridge using xfem for crack propagation to crack the mortar element. However, I have faced this error several times and I did not find anything to help me understand what does it mean. 

The error is (The system error in std_findcutshape3d8_xfem -- nodal level set values might not be correct for element 6880 instance mortar-1)

Thanks 

Edu ​​​​​​​3DEXPERIENCE ​​​​​​​Abaqus ​​​​​​​