Error Message

Question

An unhandled exception of type 'System.Data.EvaluateException' occurred in system.data.dll Additional information: Cannot perform '=' operation on System.String and System.Int32. I am trying to fill a data set and when i use the fill command this is the error that i get. if i take the fill statement out then i don't get the error message but it does not fill the table. does anyone know what i am doing wrong?