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UTF-8 Error Legacy OpenStudio

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.

UTF-8 Error Legacy OpenStudio

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 tried upgrading 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.

UTF-8 Error Legacy OpenStudio

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 tried upgrading 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.