This fails in the prerequisite install step wherein I presume the installer is attempting to install the 2015 runtime. Predictably the installer fails since a more up to date version of the runtime is present, but the Unreal installer doesn’t handle this case correctly and assumes that no version of the runtime is present and kills the entire install. Posted workarounds have been to uninstall the update 1 runtime, install Unreal, and then install update 1, but that seems very heavy handed and I’d rather not risk breaking a complete and working Visual Studio install just to work around the Unreal installer not properly handling an installer return code. Can we get a hotfix for this or something quickly?
Hello zwabbit!
We are aware of the issue and it is being investigated. JIRA OPP-4883 has been opened for you, and I’ll update this post once I have more information for you.
The issue seems to have been resolved as of 4.10.1, though I suspect that the actual resolution was in patches to the Epic launcher itself, since that is what is probably monitoring the installation process.