Lotus Notes mail in PB App

[pb8]

Using oleobject to create a lotus notes instance, it works fine until it hits a wrong recipient name, i need to trap the error for SEND method.
"ole_document.SEND(True, ls_recipients)"

Have script in the ExternalException event but does not go there. Have set action = ExceptionSubstituteReturnValue!

Basically need to trap the ones that failed and log it.

Any suggestions or ideas