> Is there any way I can set TAPEPROMPT NO globally?

You can set TAPEPROMPT NO in the client dsm.opt file.
If your enterprise/school uses a common model for dsm.opt, put it there.

> I also have an automatic scheduled backup of a Sun failing because
> of a tape prompt.

In the next client PTF (end of November or so), scheduled backups
will always be TAPEPROMPT NO, no matter what the tapeprompt setting.

                      -- MJ Lopatin
                         ADSM Client Development