You need at least one envelope in the gain chain

[d.healey]

I'm seeing this message You need at least one envelope in the gain chain but I do have an envelope in the chain, and I tried adding another also but it made no difference.

I also noticed that even though the envelope is enabled in the big view, it's showing as bypassed in the module tree sidebar. Any ideas if it's related to the issue above and what could cause it?

[d.healey]

Oh I know what the problem is! I just remembered that I ran into this some years ago when bypassing/enabling modulators through scripting - so there's probably another post about this...

Through clumsy scripting I managed to bypass the entire gain chain. This shows up in the xml. Changing the 1 to a 0 solves the issue.

And if anyone else is doing something similar (programmatically bypassing modulators) you can check if it's the entry for the entire chain and ignore it:

if (modulator.getType() == "ModulatorChain")