I have narrowed the issue down to the fact that the path to the project folder contained too many characters and this was causing the URBANopt simulation to fail. I imagine that NREL would consider this a bug and we will all work towards fixing it or finding better workarounds. In the meantime, I have added a fix into the latest version of Dragonfly, which will try to truncate the project folder in cases where it is too long. I included it in this update here:
This should give an automated fix for your case for the time being and you can get it on your end with the LB Versioner in an hour or so.
This also gives me some confidence that @Thiago_Goes was experiencing the exact same issue. It’s just that the reason why his URBANopt project folder was too long was because he has a particularly long username and not because the name of the model was particularly long.