This answer is provided for informational purposes only. Actual legal advice can only be provided in an office consultation by an attorney licensed in your jurisdiction, with experience in the area of law in which your concern lies.
If the claim was scheduled and the creditor was properly notified, then the debt is discharged - even if the creditor never filed a claim. This assumes that the debt was of the type subject to discharge. Talk to a local bankruptcy attorney in your area for specifics about your case.