The most common source of a Protastructure crack is a broken rigid diaphragm. In Protastructure, slabs act as diaphragms that transfer lateral loads to shear walls. If your slab meshing is inconsistent or if there are gaps between slab edges, the diaphragm loses stiffness, and the solver collapses—creating a "crack" in the load path.
: The software allows engineers to use cracked sections in seismic modeling, which provides a more realistic view of how a building will behave during an earthquake. protastructure crack
Always prioritize professional integrity and data safety by obtaining software through legal channels. If you are interested, I can: The most common source of a Protastructure crack