> set err
or off
> set err
or on default
The status of this flag can be inspected by the command show flags.
The error handler sets an internal flag which can be fetched by the function gra_status() (sect. 14.5.6). This completion status is not changed by the command 'set error on/off'.
If the user responds with the key d, SPECTRA dumps the current command structure to the terminal screen.