For each load case, you can set (in the Load Case Editor) how the hanger stiffness will be treated. For your load cases you have "rigid", "as designed", and "ignore". The message you're seeing simply means that if you have "rigid" set for a particular load case, the pre-load associted with variable spring hangers will not be applied in that case. ("Rigid" would be used to lock the spring, say for a hydrotest evaluation. Therefore the preload would not be applied.)
Is this a problem - only if selecting "rigid" was wrong.
_________________________
Regards,
Richard Ay - Consultant