SAP2000 INTERNAL ERROR DETECTED

[ajc17]

Can anyone help me understand what this error means?

I am adjusting the stiffness modifiers and shell types within a large model. When I make the same changes in a small model, I do not get these errors. Thank you!

* * * E R R O R * * *
INTERNAL PROGRAM ERROR DETECTED. PLEASE RECORD THE FOLLOWING INFORMATION:
VALUES = 5 .000000
MESSAGE = SapFire_SolveForwBackSfire2SBR: Could not solve load vectors

IMMEDIATELY FATAL ERROR - ANALYSIS TERMINATED

* * * W A R N I N G * * *
INTERNAL PROGRAM ERROR DETECTED. PLEASE RECORD THE FOLLOWING INFORMATION:
VALUES = 5 .000000
MESSAGE = Stiff_ForwSBR: Sparse solution for loads failed

IMMEDIATELY FATAL ERROR - ANALYSIS TERMINATED

 

[masomenos]

Under the Analysis options, try changing from default Advanced solver to standard solver which gives better error messaging