Mark,

I'll check this on Friday and get back to you!

Assumption: it's very well possible that you have to compile your own 64-bit version of "wupdate" (I think your installer writes 64-bit registry keys and the 32-bit wupdate checks the 32-bit equivalent). Or even better (if this is the cause of this issue) we'll provide 64-bit versions in SetupBuilder 2022.

Friedrich