HP 3000 Manuals HP 3000 Manuals
Error Handling SDCDE recognizes four different categories of errors. SDCDE responds to these errors in different ways, depending upon the category. The four SDCDE error categories are described below. Syntax errors are errors caused either by mistyping a command or by specifying an illegal command construction. When these errors are detected, a caret pointer is displayed pointing to the location of the error, along with an error message. Operational warnings are errors that can occur only during source generation, but are not considered to be serious enough to require termination of the process. When such an error occurs, a warning message is issued and source generation continues. Operational errors are caused by commands that cannot start or continue execution, due to an invalid operation. For example, issuing the GENERATE command when no dictionary is open is an operational error. Another example occurs when an error is encountered during source generation that is considered serious enough to terminate the process. An error message is displayed in response to these errors. Fatal errors are usually disc-related errors over which the program has very little or no control. When such an error is detected, the program is terminated. Failure to open $STDINX is such an error. When a fatal error is detected by the system, the Job Control Word (JCW) is assigned a value greater than or equal to FATAL.