How to suppress Lookup transformation no-match output if all rows match.

Hi. I have a Lookup Transformation that sends its matched output to an OLEDB destination and its no-match output to a flat file destination. The Lookup Transformation is configured to "Redirect rows to no match output" when there are no matches.
The problem is that even when all rows match (there is no no-match output), the flat file destination creates an empty file. How can I change this so that the no-match out put "runs" only if there is no-match output? I don't want an empty file to
be created if all rows match.
Thanks.

Hi Peter,
If I am not mistaken, there is no way of controlling the creation of empty files. However this can be handled by adding a "File System Task" to Control Flow for deleting the file if no records are gone through "No-Match Output". Here are the steps for doing
it;
Create a variable for holding number of records going through No-Match output.
Use the variable with "Row Count" transformation. Set "Row Count" in between "Look up" and "Flat File Destination".
Add a "File System Task" just after the "Data Flow Task" for deleting the file.
Set Precedence constraint with an expression using the variable created for executing "File System Task".
Dinesh Priyankara
http://dinesql.blogspot.com/
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