One or more of the variables in the line is of a type inconsistent with the other variables or with the type required by the command or instruction. For example you may be trying to mix location variables with real-valued variables. If this error occurs upon exiting from the editor the variable type within the program conflicts with the type of a global variable that is already defined. Verify the syntax for the operation and reenter the line correcting the mismatch. Delete conflicting global variables if appropriate.