Advice on breaking up Stacked Sequences in 6.1?

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I've dived right into an old but functional test system ~300 VI's. Flow and structure is pretty hard to follow and I'm thinking of breaking it up into state machines.

Any ideas on how to approach a stacked sequence beast in 6.1? Flat sequence seems crucial to the method described here.

Rough layout of main vi attached:

[dan_u]

Open your VI in LV 8.x and use the method described in your linked thread 😉

You can copy the sequence and remove it while displaying frame 0 in the original and frame 1 in the copy. If you have controls/indicators they will be duplicated. Also, wire connections via sequence locals will be lost. So you will have to rewire and clean up your code. But I think there's no straightforward solution because flat sequences didn't exist in 6.1.