Error in base file...at line number 59: ElemsMatProp: element without material

[olvrramos]

Can someone please help me how to resolve this issue? I can send my model. I just need to complete the simulation for my class project.

Error in base file 'C:/Program Files/GiD/GiD 15.0.1/problemtypes/OpenSees.gid/../OpenSees.gid/OpenSees.bas' at line number 59: ElemsMatProp: element without material


comand:ElemsMatProp must be a char
Error in 'strcmp' or 'strcasecmp'.
Error in base file 'C:/Program Files/GiD/GiD 15.0.1/problemtypes/OpenSees.gid/../OpenSees.gid/OpenSees.bas' at line number 59: Error into an *if expression

Thank you