Scenario 1:
This warning typically occurs when one or more shell components are incorrectly defined as non-pressure-bearing components.
In AutoPIPE Vessel, a shell that is not marked as Pressure Bearing is treated as a dummy shell. Dummy shells do not form part of the vessel pressure boundary. Consequently, AutoPIPE Vessel splits the model into separate pressure chambers (compartments).
For example, if any shell components are configured as non-pressure-bearing, APV may interpret the vessel as containing additional chambers, which can trigger Warning 127.