how to solve this problem in CFX5 calculation?

cfxbeginer

I use CFX5.5.1 I add a body force model in the domain. It has a problem of calculation. An error usually appears in the process of calculation and stops the process: error #001100279 has occured in subroutine ErrAction. Message: Floating point exception:Type Unknown Details of error:- Error detected by routine MAKDIR CDRNAM=CopyDs CRESLT=ILEG Details of error:- Error detected by routine POPDIR CRESLT=ILEG An error has occurred in cfx5solve

I tried to change the advection scheme, local timescale factor,better initial guess,different boundary condition. It is still there. Anyone knows how to solve it ?

thank you very much!