This question came up at my office today. Can I have two FME Flow engines at different versions installed on the same Windows Server? I’m guessing that the answer is no but I wanted to get official verification on that.
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I’m suspecting the simplest way to make this work would be to use Docker with separate containers for each version.
If you want all the Engines to connect to the same Core, be aware that there are some fairly important restrictions on version compatibility:
Adding FME Engines that do not match the primary release version of the FME Flow Core is not supported. The primary release version refers to the first decimal value following the release year. For example, if the release version of the FME Flow Core is 2020.0, FME Engines from release versions 2020.0.1 or 2020.0.2 are supported. However, FME Engines from release versions 2020.1 or 2021 are not supported.
https://docs.safe.com/fme/html/FME-Flow/AdminGuide/Adding_FME_Engines_on_Separate_Machine.htm
Thank you for the response and the information!