Unable to run PAT (ParametricAnalysis Tools) simulation

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Hello,

I'm just starting to use Open studio for thermal simulation. I completed the tutorial and tried to use PAT twith two alternatives about reducing lighting loads. However, an error occurs every time I run PAT (even though my baseline model is running in OS) :

UserScript : Error : unable to find required file while creating LocalProcess : U:/.../measure.rb : U:/.../user_script.rb basepath :

Have you an idea how to fix this problem ?

Thanks in advance