Article John Zarate · Sep 16 2m read Custom File Adapter - Lookup Table / Dynamic Files My problem was separating HL7 messages by message type. I had to create multiple File Operations. So I with custom code I am able to use 1 File Adapter for 1 interface and multiple message types. I did experiment pulling the MSH 4 out of the raw content to further access dynamic information, but that may open a need for more robust error checking / lookup default actions. Using the recommended naming convention of "To_FILE_<IntegrationName>" I decided to use a generic file name and path in the default settings. #InterSystems IRIS for Health 2 0 0 17