External Launcher UF from SQL Report UF (Or Dynamic External Launcher in general)

Currently working and learning about the SQL Report UF as well as trying to harness the External Launcher UF to create dynamic links. The end goal being a small Package Tracking system that would get it's link via the SQL Report.

Current Setup:

Function Button linked to a SQL Report UF (Works Great)

One column of the SQL Report is tied to a UF External Launcher.

This is where the process unfortunately breaks down it would seem.

The error I receive is:

"Could not active the universal link button (Golden arrow) due to an incorrect configuration. Please check your SQL Report configuration. Error: Could not find Item qith UID: "$BOY_1,TrackNo,0" on Form: BOY_41_SQLREPORT_UF-019 (Sales Order Tracking).

As you can gather from the above, my External Launcher UF is using the arguments: "$[$BOY_1,TrackNo,0]" with no quotes around it, derived from the system info for that field.

Referencing another thread, I tried using "$[$BOY_1,trackno,0]", but have since had no luck with this. The documentation seems to infer you can use a dynamic reference, and I believe my reference is correct, it just won't actually run the program.

System Info I'm seeing: