refer service case - Service Case 1361907: RCDC software will be collapsed if the model contain an earthquake load combination.
if higher diameter is not available and ductile detailing is not satisfied with the available diameter (with minimum spacing), failure is not tracked in RCDC.We have to track this ductile detailing failure like Non ductile detailing failure. When there is a high shear force and program cannot detail the shear reinforcement with available diameter, it is tracked as shear failure (might be shear detailing failure). Same logic applies to ductile detailing failure.