@cristina_mg, I’m glad you got it to work! Are you using the .m, .xlsx or .xml file input method in Matlab?
I found a similar situation with another UWG FATAL ERROR here (RunUWG 0.0.02 is not running), that is, the compiled Matlab version throwing an error, but a similar set of inputs works fine with the .m method.
The fact that Matlab manages to perform without throwing the error, while the compiled version does, indicates that: there may be a bug in the compiled software, there may be a bug in the .xml input method, or we are introducing the bug (i.e high heat flux) through the customization of materials or geometry when we generate the .xml.
So let me know if you are using the .m, .xlsx or .xml file input method in Matlab, that’ll go a long way to start figuring out this bug!
As for the outdoor and indoor comfort zone problem, you should start a new topic to discuss it.