CMC or XenApp Advanced Configuration Loader fails to Launch after Upgrade

After applying an upgrade or patch to your XenApp servers the CMC or XenApp Advanced Configuration Loader fails to start with the error

The Presentation Server Console could not be started because there was an error creating the process. Would you like the details.

Ive seen this problem on XenApp 4.0 to XenApp 4.5 upgrades and now again after installing HRP05 for XenApp 4.5
The problem is due to Java requirements. Pressing the YES to the error message will give you more of a clue.

XenApp 4.0 Resolution
The CMC for PS4 appears to be hardcoded to look for key
HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.4\JavaHome

Put this old entry back but point the Java Home key to location of the currently installed java (eg. C:\Program Files\Java\jre1.5.0_09)

This fix is discussed on older version of the CMC that had the same type of problem in article CTX102338

XenApp 4.5 HRP05 Resolution
After HRP05 upgrade the newer CMC with stupid name requires at least Java 6. Installing this corrects the launch problem.