Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Have you read EnergyPlus Version Compatibility?
The latest DesignBuilder is compatible with EnergyPlus v9.4.
You should also check OpenStudio SDK Version Compatibility Matrix or OpenStudio Application Version Compatibility Matrix.
If we want to exchange idf files between different software, I think we should basically use the same EnergyPlus version compatible software to avoid errors. Or we can update the idf file version by IDFVersionUpdater in order to match the version, but we cannot convert idf files to older versions.
