Verify Submitted Job Completion

I know this is a simple problem, but after reading through dozens of posts
in the archive, I didn't see the answer.

I have an interactive job stream that is trying to display an image file
that is archived on the IFS.

The user doesn't have authority to the file's directory. The interactive
job submits a job using profile with higher authority. The submitted job
copies the files from the archive directory to a working directory. After
the sbmjob cmd, the interactive job issues strpco and strpccmd to display
the image (now available to the user) on the user's PC. Obviously, we
don't want the strpccmd to start until we know the copy has been completed.
Currently we are using a DlyJob(3) to "pause" the interactive job long
enough for the batch job to complete. Since the copy function is taking
place in it's own jobq and machine use is low, this usually works.

Occasionally, the strpccmd executes too soon. This simply means the user
has to try again to see the image (a minor annoyance). We've increased the
delay to 5 and 7 seconds, but that just makes the process "seem" to take
longer to the user. Most of the time, the copy function is a sub-second
run.

Does anyone have an example of a better way to delay an interactive job
stream until a batch job it submitted is complete?

Thanks,

Paul Thieme