CDISP0820E

The primitive operator name operator, which specifies punctuation for port number input port number, is in a parallel region that is directly adjacent to an upstream parallel region.

If a parallel region is directly adjacent to another parallel region, the upstream parallel region will drop all punctuations, so a punctuation expecting port cannot be connected to any stream exiting a parallel region.
Connect the input port to a stream that either generates or preserves punctuation.