Hi Phillip,
It seems the tool itself is corrupted. Maybe some jar files of this tool are missing as well.
The other solution is to replace the jar file which is causing the startup issue:
\usr\sap\<SID>\DVEBMGS??\j2ee\cluster\bin\ext\tc~bl~txmanager~plb\lib\private
The jar file is located in the above folder. You can download the servercore component from SAP SMP.
You may want to use the SP1 version of it. Unzip it and find the sap.com~tc~bl~txmanagerimpl~plb~impl.jar in it. Copy the file to the folder above, and restart
the system then check again. Remember to change the sync mode to mode other than force.
Regards,
Daniel