UPGAST-00014 Error - OBIEE 11g Upgrade Assistant

At client site, while initiating the Upgrade Assistant to upgrade OBIEE 10g to 11g, we have received the below error -

"[2013-09-12T17:58:24.542+02:00] [Framework] [ERROR] [UPGAST-00014] [upgrade.Framework] [tid: 10][ecid: 0000K4It8m45i^l7^vZf661ICUHy000000,0] unable to connect to WebLogic Server at localhost:29100[2013-09-12T17:58:24.543+02:00] [Framework] [ERROR] [] [upgrade.Framework] [tid: 10] [ecid: 0000K4It8m45i^l7^vZf661ICUHy000000,0] Cause: Failed connecting to the WebLogic Server at the specified host and port. Action: See the secondary error message for additional details.[2013-09-12T17:58:24.543+02:00] [Framework] [ERROR] [] [upgrade.Framework] [tid: 10] [ecid: 0000K4It8m45i^l7^vZf661ICUHy000000,0] t3://localhost:29100: Destination unreachable; nested exception is: [[ java.net.SocketException: Connection reset; No available router to destination]]"

There were some suggestions on the net to configure a network channel, which did not work. After making the changes as suggested in the post https://forums.oracle.com/thread/2469145?start=0&tstart=0, we encountered the same exact error as in the post while activating the changes.

After investigating, we have identified that OBIEE 11g Admin server is configured to run on both secured port and non-secured port.

The above error was resulted when secured port is provided to the Upgrade Assistant.

This issue is resolved when we switched the port number ie passing the non secured port for Admin Server, while initiating the Upgrade Assistant.  No need to create a network channel.