Need help resolving AP Invoice Approval Workfow Error

Can someone help resolve below AP Invoice Approval Workflow Error? It sounds like a notification attribute field is too large for the field or has a special character. How do I tell which field is causing the issue? How do I resolve? Any help would be appreciated.

Thank you.

Pam

Failed Activity XXTBC Set Notification Attributes

Activity Type Function

"Error Name " -6502

Error Message ORA-06502: PL/SQL: numeric or value error: character string buffer too small

Error Stack XXTBC_ap_invoice_wf.set_notification_attributes(XXTBC_AP_INVOICE_WF.set_notification_attributes: 03)

Wf_Engine_Util.Function_Call(XXTBC_AP_INVOICE_WF.set_notification_attributes, APINVAPR, 1753083_3, 252635, RUN)