A customer was running a "large" report to the screen, and got a C-Assert:
Module: RT.C.4903
Process: 0LA/Input - PRINT ON SCREEN
Bad Prt Write - Error - Already on File
When using a Form defined with a length of zero, the maximum size of a text report displayed on the screen is 65,535 lines. If the Form Length is not zero or the Form Type is PDF there is no limit.