Thanks for bringing this up, @Pranav_Prasad, @Ni7cksurf , and @ajassoi .
Even though these are all cases where you will not be able to build a complete load balance because you are missing the het flow through the envelope, you should not be getting a cryptic message like “Need more than 4 values to unpack.” It looks like I introduced the possibility of getting this message when I added the option to get envelope loads for detailed faces as I mentioned in the LBT 1.9 release notes.
I just pushed a fix so that you will no longer get the cryptic exception for this case:
… and I added a more helpful warning about the need to connect the face energy flow:
You can get the change on your end now with the LB Versioner. Given that this issue only affected the error message and isn’t a serious blocking bug and only affects the warning message, I’m not going to update the LBT 1.9 Food4Rhino installer for this but it will be reflected in the Pollination single-click installers, the development version that people can get with LB Versioner, and (of course) LBT 1.10 when it eventually happens.