I Used a zero thickness cohesive element between a rebar and concrete. CDP, cohesive materials properties(damage for traction seperation laws)  are used in the analysis and displacement control applied.. Interaction surf to surf (normal and tangential behaviour is used)..Submitted for an analysis getting  "warning"

Output request cfailure is not available for element type coh3d8

Output request damagec is not available for element type coh3d8

Output request damagefc is not available for element type coh3d8

Output request damaget is not available for element type coh3d8

Output variable cfailure has no components in this analysis for element type c3d8r

Output request damagefc is not available for the material for element type c3d8r

Output request damageft is not available for the material for element type c3d8r

The option *boundary,type=displacement has been used; check status file between steps for warnings on any jumps prescribed across the steps in displacement values of translational dof. For rotational dof make sure that there are no such jumps. All jumps in displacements across steps are ignored

There are 52 warning messages in the data (.dat) file. Please check the data file for possible errors in the input file.

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