Fail to install xenserver patch: The uploaded update file is invalid

Fail to install xenserver patch with error "The uploaded update file is invalid" xensource.log shows below trace. Oct 12 15:22:10 xxxxx xapi: warn||5521 HTTPS 192.168.23.251-:::80|poolupdate.introduce R:fc93dd2259e5|pervasiveext finally: Error while running cleanup after failure of main function:...

Fedora Core 4 : gnupg-1.4.2.1-1 (2006-116)

The GNU Privacy Guard provides encryption and signing for messages and arbitrary files, and implements the OpenPGP standard as described by IETF RFC2440. Version 1.4.2 of GnuPG would in some cases erroneously exit with status 0 signaling no errors if it was invoked to check a signature but found ...