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Yes, that is true.

The OS needs a path to find any program that it executes.
Either the full path to the program is provided or the program is in the current directory
or the path to the program is in the Path...

What program was executing when

Sorry, I do not know how to use Maven.


The program provided the full path to the java.exe command so that the OS could find it.

Have you solved the problem now?

Given that location, the PATH variable should contain this with all the other values currently in PATH:
C:\Dev\apache-maven-3.8.6\bin

I think MAVEN_HOME should be set to:...

The OS needs a way to find any command that is entered on the command line.
One way is to give the full path to the command on the command line. For example:
D:\Program...