Hi Lukisan,
unfortunately, I have never worked that deep with such a version as we had to retire our project for other reasons before we could upgrade to such a version.
But you might want to check the IS Administrators Guide for further informations.
Eventually you have missed some configurations somewhere which make the invocation behind the succes fail.
“Unkonwn error” is quite unspecific error message, therefore I hoped that looking up the logs via other ways might reveal a bit more specific error message here.
Regards,
Holger
#Integration-Server-and-ESB#webMethods