Currently I Iam performing Heat-transfer analysis. I and the Abaqus is giving the warning messages with very large number of iterations (like 9) to attempt to converge, still solution doesn't converges.  

Solver problem. Zero pivot when processing node BLOCK-1.107572 D.O.F 11

However the program was working well with only DFLUX subroutine. But I need to include FILM to define Temperature dependent HeatFlux coefficients