The RHAMT eclipse plugin executes rhamt-cli.bat in a clean environment with only the JAVA_HOME environment variable set. However, the rhamt-cli.bat script expects default environment entries for PATH, OS, USERPROFILE,etc.. to be set.

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:05.489
!MESSAGE Attempting to retrieve ExecutionBuilder from registry.

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:06.613
!MESSAGE Begin start RHAMT.

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:06.614
!MESSAGE Using JAVA_HOME - C:\Program Files\Java\jre1.8.0_161

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:06.615
!MESSAGE Starting RHAMT in server mode...

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:06.616
!MESSAGE Command-line: [C:\Users\cheyne\.p2\pool\plugins\org.jboss.tools.windup.runtime_4.0.1.v20180220-0537\windup\rhamt-cli-4.0.1-SNAPSHOT\bin\rhamt-cli.bat, --startServer, 1100]

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:06.617
!MESSAGE Attempting to retrieve ExecutionBuilder from registry.

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:08.258
!MESSAGE Message from RHAMT executor: 'findstr' is not recognized as an internal or external command,

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:08.258
!MESSAGE Message from RHAMT executor: operable program or batch file.

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:08.269
!MESSAGE Message from RHAMT executor: 8 was unexpected at this time.

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:08.278
!MESSAGE The RHAMT process failed:

!ENTRY org.jboss.tools.windup.runtime 1 0 2018-03-16 16:49:08.279
!MESSAGE Process exited with an error: 255 (Exit value: 255)