I am attempting to open an old .idf file, created in DesignBuilder. I am using EnergyPlus v8.2, Sketchup v2014, and the Legacy OpenStudio plugin version 1.0.12. I to upgraded the file to the most recent EnergyPlus version and use the plugin version 1.0.14, but was still getting the same error. I opened the Ruby Console when attempting to open the file (as suggested here), and got the following error:
Error: #ArgumentError: invalid byte sequence in UTF-8
What does this mean, and what can be done to fix it? A link to the file can be found here.