Card 4: duplicate interchange flag

The duplicate interchange flag is a flag that can be passed to indicate that the interchange is a duplicate.

The compliance check maps work only with a single interchange at a time, and do not track the interchanges that are processed before, or after the current interchange. You can, however, track other transactions, and use a preprocessing step to set this flag if the interchange is recognized as a duplicate. The value must be either T (interchange is a duplicate), or F (the default interchange is not a duplicate). If the flag is set to T, then the EDI compliance checking maps generate the appropriate logs and acknowledgment for the duplicate interchange. The default value for the flag is F. To set the flag to T, you can use the –IE4 option, for example:

-IE4 T