CUCM 8.6.1 Refresh upgrade to 10.5 fails with Internal Error (Function: ipmReadNormalizedInputLine) [SOLVED]

Question

Hi,
we are upgrading our CUCM 8.6.1 to 10.5.1 on VMWare Enviroment (vSphere 5.5 running on UCS). 
We are running this upgrade in a sandbox, in order to avoid any problem in the production cluster.
We followed the refresh upgrade guide ( http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/upgrade/10_0_1/CUCM_BK_U4214F9D_00_upgrade-guide-cucm-100.pdf)
Pre-configuration steps
Take a clone of the running publisher and put it in the sandbox
Remove DNS servers (they are not available in the sandbox)
Change the NTP Server with a ntp that is recheable from the sandbox
Check that Gateway and NTP connectivity are OK for the CUCM
Pre-upgrade:
Run the cop files to update keys and increase disk space (log partition is 80% full)
Shutdown the CUCM VM and
Increase disk space on the VM configuration
change VM OS from RedHat5 (32bit) to RedHat 6  (64bits)
change VM nic from flexible to VMNIX3
Restart the VM
Upgrade
1. mount the iso
2. connect to OS Administration web interface and perform the Software installation from CD/DVD
3. upgrade process works fine up to the post-installation task
During post-installation tasks (after completing the DB Load and Transforming Copy) the Upgrade process always fails fails with an internal error
IPM|Internal Error, File:ipm.c:2011, Function: ipmReadNormalizedInputLine(), "/usr/local/cm/script/cm-dbl-install RU PostInstall 10.5.1.10000-7 8.6.1.21019-1 /usr/local/cm/ /common/component/database /common/log/install/capture.txt " failed (1)|<LVL::Critical>
IPM|  end-of-session "Installing database component": 1109.369 secs.|<LVL::Info>
IPM|Close progress meter "Component Install"|<LVL::Info>
We also tried the intermediate steps:
- upgrade from 8.6.1 to 9.1 : worked
- from 9.1 to 10.5: Failed with the same error
- from 9.1 to 10.1: Failed with the same error
any help will be greatly appreciated, thanks
Stefano

Answer 1

Issue was related to Dial Plans, the logs showed
16:45:46.204 |   DBUtil::BlockCopyTable ### *ERROR* ###:  (diagnosis):  Bulk Data Migration for table availdialplan failed due to data constraint issue, (-971).
16:45:46.611 |   DBUtil::BlockCopyTable *
16:46:16.555 |*ERROR* Error fetching column information: [Informix][Informix ODBC Driver][Informix]Could not position within a table (informix.systables).
16:46:16.588 |   DataConverter_5to6::CopyTables *ERROR* BlockCopyTable failed to process table (availdialplan)
16:47:52.395 |   installFull *ERROR* Prior Cancel or Error Processing convert5to6()
Cisco TAC fixed by updating the primary key in the DB.
After the fix we were able to perform the RU as expected.