Errors caused by different versions of energyplus

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Hello, i have an .idf file using energyplus version of 8.5. However, currently the energyplys 8.8 is installed in my computer. So how can i use my energyplys of version 8.8 run the idf of version 8.5 successfully without downloading and installing the energyplus 8.5. i will be grateful if someone can give me any comments.

Open EP-Launch in version 8.8, and go to the "Utilities" tab.
Select "IDFVersionUpdater" from the drop-down list
Cick "Run IDFVersionUpdater"
Follow the prompts in the pop-up window to chose your v8.5 file and click "Update File"

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Anna Osborne Brannon

answered 2018-01-07 20:53:45 -0500

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Thanks for you answer, Anna. Your answer correctly solves my problems. It seems that we can upgrade the version of idf through using the Utility options, but i am also curious about how to downgrade the version of idf file.

Dr. Fan (2018-01-07 21:15:51 -0500) edit

It looks like it is possible, but you would lose a lot of information and potentially cause issues. Most softwares (e.g. IES) do not allow you to go backwards: https://unmethours.com/question/18422...