After saving a run, you can restore the run using the restore command. dbx uses the information in the save-file. When you restore a run, dbx first resets the internal state to what it was at the start of the run, then reissues each of the debugging commands in the saved run.
The source command also reissues a set of commands stored in a file, but it does not reset the state of dbx; it only reissues the list of commands from the current program location.
For exact restoration of a saved debugging run, all the inputs to the run must be exactly the same: arguments to a run-type command, manual inputs, and file inputs.
If you save a segment and then issue a run, rerun, or debug command before you do a restore, restore uses the arguments to the second, post-save run, rerun, or debug command. If those arguments are different, you might not get an exact restoration.
To restore a debugging run saved to a file other than the default save-file, type:
(dbx) restore filename