In creating a sample project to send in for another bug, I was trying not to hardcode any paths to files. So, in PropertySet Load From File, I gave simply MyPropertySet.ini.
The action found the file (because if I changed filename it would complain). But it claimed that it couldn’t find the requested section within the file.
I had to change the Ini File property of the action from “MyPropertySet.ini” to “.\MyPropertySet.ini”
The problem is you are not specifying the full path to the file. Do not use unrooted relative paths in FinalBuilder, they are not supported due to it’s multithreaded nature. See this FAQ entry : https://www.finalbuilder.com/Support/Forums/aft/10321.aspx