1 Effective date searches are available only for US area codes. 2  Our sources for non-US NPA-NXX data do not provide this information. 3  If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero. Effective date searches are available only for US area codes. 2  Our sources for non-US NPA-NXX data do not provide this information. 3  If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.
If you press Y (for yes) in response to this message, the batch program ends and control returns to the operating system. Therefore, you can insert the pause command before a section of the batch file you may not want to process. While pause suspends processing of the batch program, you can press CTRL+C and then Y to stop the batch program.
By default, the command processor will continue executing when an error is raised. You have to code for halting on error. A very simple way to halt on error is to use the EXIT command with the /B switch (to exit the current batch script context, and not the command prompt process). We also pass a specific non-zero return code from the failed command to inform the caller of our script about the failure.