Windchill CPS 12.1.2 CPS 10 Update in linux server failing

[PraveenR1995]

Version: Windchill 12.1

Use Case: Our current server is in 12.1.2 CPS 7 and we are in process of updating CPS to 10. We have downloaded the installers and placed in /appl/tmp location having full permission for root. The installation is done using root user and it fails at 5% progress.

Description:

The PSI installer fails with the below error and the installer .log indicate that tomcat sub installer couldn't start.

tomcat installer appears to have failed to start. Its PTC and/or XML log is missing

[VladimirN]

Articles:

• "PTC Solution Installer fails when the Linux noexec permission has been set on the /tmp and /var/tmp folder in Windchill": https://www.ptc.com/en/support/article/CS178146 
• "PTC Solutions Installer (PSI) fails with error message Windchill Loader failed in Windchill PDMLink": https://www.ptc.com/en/support/article/CS224955 

[PraveenR1995 · Accepted solution]

Thank you for suggesting the above articles. What really fixed the issue was the fact that we were setting the 

export _JAVA_OPTIONS=-Djava.io.tmpdir=/appl/tmp variables from the putty/terminal session itself instead of the GUI (VNCViewer session). When we set these from the GUI session, it resolved the issue.'