Hi James,
You're right, I should have written on the other thread for not polluting this Topic. But now it's done, I would like to close this with the solution of my problem.
Actually, I had a kind of corrupted VI, not easy to see, and not found just building each actor independently. I just realized that something went wrong in my code behavior, and apparently, the VI didn't executed at all (always returning default values), but not easy to debug as it was a reentrant SubVI.
I finally rewrote this VI from scratch, and also did a mass compile (because I had a 1min freeze of LabVIEW each time I stopped my main VI, and that created insanity errors https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P9QYSA0 )
Everything went back nomal after that, and I'm now able to build my Applications without removing Block diagrams.
Btw, I realized when unchecking "Remove unused members of project libraries", that you have a broken VI in one of your lib : "Extract Variant to Data.vi" from SendMSG.lvlib
Regards