I think I see the problem.

When I open my all midi .sgu file in the VSTi, I see my yellow midi tracks and also see Super Midi Tracks are green (indicating they have been rendered or the app thinks they are audio and need to be rendered). When I generate the midi stay midi and I can drag them as midi, but the Midi super tracks stay green and are audio only.

This is the same problem I reported for the save VSTs in BIAB. The VST on a yellow midi save but the VST on a blue midi super track does not.

Am I the only one who uses Midi super tracks?

BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6