Question-and-Answer Resource for the Building Energy Modeling Community
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In general, the answer that Chandan is probably the best approach if someone has a bunch of files that they want to update to a newer version of EnergyPlus. If you want a script that can be run each time in a workflow, I would suggest a batch file that calls the Transition programs directly. Essentially, each transition program named TransitionVA-B-C-to-VD-E-F.exe needs to be run to update the file from one version to the next until you reach the version you want. The documentation on how to run Transition is here. It is important to have all the files in the proper directory including the IDD files for each version and the report variable CSV files.
