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The -cu switch checks for unique control numbers within a transaction. ST Transaction Control Numbers can now occur in any sequence, as long as they are unique.
If duplicate control numbers are found, a 6054 error is written to the log.
Inbound maps.
4.2
The syntax for this switch is:
-cu
Validating control numbers in Windows
Open the Run Inbound Map window.
Click the Option 2 tab.
In the Transaction Control Number Check group, select Unique Control Numbers.
