ON_ERROR

ON ERROR

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ON ERROR GOTO {line_number|0}

Turns error trapping on or off. When line_number is set, any error causes the error handling routine starting at that line number to be called; no message is printed and program execution is not stopped. The error handling routine is ended by a RESUME statement. While in an error handling routine, events are paused and error trapping is disabled. After the RESUME statement, any triggered events are picked up in the following order: KEY, TIMER, PLAY - the order of the others is unknown. Unlike event trapping, error trapping remains active when no program is running. ON ERROR CONT turns off error trapping.

Parameters

line_number is an existing line number in the program.

Notes

It is not possible to start the error handler at line number 0.

Errors

line_number does not exist: Undefined line number.