Intellij Won't Start after install


I have been using Intellij for many years. Today I uninstalled previous version and installed 2020.3. I can't open it. I tried to run it from the command line as suggested by another post. I got this error, even though my min heap size IS smaller than the max heap size:

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Error occurred during initialization of VM
Initial heap size set to a larger value than the maximum heap size

This is my idea64.exe.vmoptions --



Please delete idea64.exe.vmoptions file from the Configuration directory:


I don't have such a file in the C:\Users\xxx\AppData\Roaming\JetBrains\IntelliJIdea2020.3 directory. Below is a screen shot of the directory


Do you have JAVA_TOOL_OPTIONS or _JAVA_OPTIONS environment variables defined that override default VM options for all the Java apps?


Nope, I just double checked. No such environment variables.


You may be overriding the default config location, see and

IDE is probably picking up some other .vmoptions file from a different directory.

Search your drive for *.vmoptions files and delete them (except those in the bin directory of the IDE).


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