CZM using interaction module in ABAQUS

Hello everyone,

I am getting a strange bug regarding CZM in ABAQUS. I have discrete joints between two copper bars in a DCB sample. I use the interaction module to model the contact in interface between the joint and copper. The contact works pretty well in some of the joints while no contact forms in some other ones especially the leading joint! It means that seperation happens immidiately after job submission. I would really appreciate if somebody can help me with this.

Thanks,

Amir