Several "Access is denied." lines in the compiler's stderr output on Windows Server when executed without admin rights

[ysabih]

I have a Windows service that uses Scala compiler 2.13.1, the compiler is intalled in C:\scala. Now I'm trying to use Scala3, I've tried 3.0.2, 3.1 and 3.2.1, I installed it manually: I downloaded the relaese zip and made sure it Java bin path is added to PATH, I also created the environment variable JAVA_HOME. When I run this command C:\scala32\bin\scalac.bat Sample.scala in the service, I get this on stderr:

Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Error: Could not find or load main class dotty.tools.MainGenericCompiler
Caused by: java.lang.ClassNotFoundException: dotty.tools.MainGenericCompiler

I tried adding the compiler's own lib path to the class path C:\scala32\bin\scalac.bat -cp "C:\scala32\lib\*" Sample.scala, this time compilation succeeds, but I still this on the stderr:

Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.
Access is denied.

Please note that when I run the first command C:\scala32\bin\scalac.bat Sample.scala as an administrator, it works without any errors, is the failure caused by the compiler trying to access directories ?