I'M USING ABAQUS IN MODELING A BEAM UNDER flexural, "BENDING".   my problem is the concrete material model with tension stiffening. my problem is occured repeatedly for all element types.
Although, i imported the input files obtained from the ABAQUS ducomentaion for support; the same error obtained.. the programe message is

The plasticity/creep/connector friction algorithm did not converge at 10 points

please help .. if  any one have a valid input file that represent the concrete model with the tension stiffening please send it .. thanks so much.