Your TestQ Procedure probably has a prototype of (*QUEUE Q2) so it has no idea of the structure.
For that Procedure to “understand” that Q2 has F1 and F2 you must pass it as a Named Queue which usually requires a TYPE Queue e.g. (*Q1_QUEUE_Type Q2) be defined in the scope for both procedures, usually global or an INC file.
Look at the Help:
- PROCEDURE Prototypes
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- Prototype Parameter Lists
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- Passing Named GROUPs, QUEUEs, and CLASSes
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See also