Erract

"erract" is a variable for error handling in macros. If an error occurs within a macro, the value of erract is executed as a command. By default the exit command is executed, i.e. the program returns to interactive input. Errors that occur interactively are displayed and the program continues with the execution of the next statement.

Example: set erract="show; quit"

        In case of an error in a macro a listing of all global variables
        is given, and the program is stopped. Such error handling can be
        useful if the program is used non-interactively.