Monitoring

The monitoring facility enables the programmer to set the level of information displayed by the Data Access Routines. It is set by an argument passed to the initialization routine D3INIT and can be reset at any point by a call to D3UMON. If the monitor option FULL is selected, then every time a data access routine is called, the name of the routine is displayed along with the values of all the input arguments, and on exit the returned argument values are displayed, together with all warning and error conditions encountered. Alternatively, the programmer may set the monitor level to OFF. In this case, he can use the routine D3EMSG to display error messages as he wishes. Note that even if the monitor level is set to OFF, some important low level messages will still be displayed on the screen.