memory required may greatly exceed predicted amount
 

hey guys

I am modeling a flow inside a layered tube using FSI method.
I recieve this message:

*** WARNING *** CP = 76.955 TIME= 15:24:50
Pivoting has been activated for the Sparse Matrix Solver. The memory
required may greatly exceed predicted amount. In that event rerun
with increased memory using -m option (refer to the Basic Analysis
Procedures Guide, Ch. 19).
0***** process error reported by subroutine xdslfa
see xdslfa abstract (ier = -512)


*** ERROR *** CP = 779.459 TIME= 15:35:09
Input/output error on unit = 32. Please check to see if the disk is
full.


any idea what is this?