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The NTE segment is commonly used for plain-text "notes" containing descriptive data that doesn't conform to the structured format used for most other data in HL7 messages. It could certainly be used for the storage of base64-encoded binary data, and the likely candidate for that would be the NTE:3 Comment field.

If the base64 content is less than ~3.5MB in size, it can be assigned directly to that field in a DTL or using the SetValueAt() method of the message object (Note: the HL7 specification does not define a maximum length for the Comment field, but there are considerations for IRIS storage that need to be handled appropriately). If larger than 3.5MB, it must be stored using the StoreFieldStreamRaw() method of the EnsLib.HL7.Message object (there is also a StoreFieldStreamBase64() method but it's not applicable if your data is already in base64 format). If you must use the StoreFieldStreamRaw() method, note that it must be the last method called against the NTE segment as it makes the segment immutable.

The recipient of the ORL_O22 message must be informed of this atypical use of the NTE segment so that it can be handled appropriately.

You can use the "*" shorthand for obtaining a count of the number of repeating segments (or fields, or groups) in a when clause. Anything greater than 0 evaluates to "true," so adding a Not() around the expression negates that:

Note: The original reply had Document.DocTypeName rather than Document.Name as the first part of the condition expression. The DocTypeName property refers to the message structure, not the actual message trigger event. That's in the Name property.

You're logging on to the sftp server as user test_user, but attempting to write a file to C:/user/testuser/desktop/orders/. Are you sure that's the correct path for that user? My suspicion is that it's a local permissions issue and not a problem with Caché's sftp support.

I'm not a Solarwinds user/expert; does it have anything useful in its log(s)?

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