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# Error Handling

`coredump_on_error`()
  Syntax:
    `coredump_on_error(1 or 0)`
  Description:
    On unix machines, sets a flag which requests (1) a coredump in case of memory or bus errors.

`show_errmess_always`()
  Syntax:
    `show_errmess_always(boolean)`
  Description:
    Sets or turns off a flag which, if on, always prints the error message even if normally turned off by an `execute1()` statement or other call to the interpreter.

`execerror`()
  Syntax:
    `execerror("message1", "message2")`
  Description:
    Raise an error and print the messages along with an interpreter stack trace. If there are no arguments, then nothing is printed.

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