HP 3000 Manuals HP 3000 Manuals
How DBChange Plus Handles Errors When you enter a DBChange Plus command, the DBCPLUS program checks the syntax of the command and, if the command is incorrect or invalid, issues an error message to $STDLIST. If you receive an error message while using the DBCPLUS program interactively, reenter the command and continue processing. In batch mode, the DBCPLUS program reports the error and continues reading commands until the EXIT command is reached. DBChange Plus usually prints an error message immediately after the command that caused it. However, because of the deferred nature of the restructuring commands, some errors are not reported at the time they are detected. Instead, they are reported when the next BASE, EXIT, or PERFORM COMMANDS command is entered. For example, a blocking factor change could potentially be recommended after each command that changes the media record size. If you enter several of these commands, you should review the error messages before deciding which corrective action to take. For a complete description of errors, their cause, and corrective action, refer to appendix A, "DBChange Plus Messages."