Handling Errors

I have a case where our EMR is sending data, but not all the values needed for the Ancillary are valued properly and causes that message to error/halt processing on the Ancillary system, not ideal but its what they do. I would expect them to still process the message except that 1 field, but they don't.

I want to add validation to make sure certain fields are valued correctly for the Vendor. 

So I add some statements to take those items that don't pass this validation out to a batch file with headers.

But I want to email out that batch file. How could I have the Email Operation validate that their is a file to send as an Attachment, if that file exists, use it to define who to send it to and what is included in the message?

Is there a sample of this somewhere?

Thanks

Scott