Problem: When upgrading from CCM 4.1(3) to Cisco UCM 7.x we got an error using the Data Migration Assistant (DMA 7.1(3)). The DMA starts and at the same time it stopps the "Informix IDS - ccm" service. After configuring the prerequisits the DMA checks the "Informix IDS - ccm" service and ended with the error "Error connecting to Database". We were not able to start the "Informix IDS - ccm" service manually. Resolution: We fixed the problem by stopping the "Informix Server Discovery process for SNMP" after the publisher was restarted. If this service is stopped before starting the DMA the "Informix IDS - ccm" service keeps running and the migration is running succesfull. Problem: When running DMA for migration from CCM 4.2(3) to CUCM 7.1(3) the result is; "Export Successful.Validation Successful with Warnings" Resolution: The information from the DMA warnings were collected and following corrective actions are recommended: Warning: UserID:rdavé: is invalid - User profile not found in LDAP search Condition: The user profile for the user does not exist Solution: you need to verify that the user is a valid CUCM user. For that you need to access t he user through the CUCM Admin page and associate a device to the user. Then disassociate the same device. This procedure will create the required profile for the user Warning: Numplan (NULL) for User pmorton is invalid. Ignoring the user Condition: Primary Extension for this user is invalid. It does not exist in the database Solution: You need to ensure that the user is associated with a valid primary extension/numplan Regarding these warnings: Table: VoiceMessagingProfile                  Row: 2 SQL error: -746(36071)    Error executing "update VoiceMessagingProfile set Name='VMP - Conted Queue' where pkid='87904580-168b-452c-9a42-32198ca12896'": [Informix][Informix ODBC Driver][Informix]Unspecified System Error =  -746. sqlerrm(36071)       pkid                         87904580-168b-452c-9a42-32198ca12896 NOT MODIFIABLE       Name                      VMP - Conted Queue       Description                           VMP - Conted Queue       fkVoiceMessagingPilot                VoiceMailBoxMask               5000       IsDefault                   false    NOT MODIFIABLE       resetToggle                          false       tkReset                   2       VersionStamp 0000000000-c7a6c673-7479-46b0-839e-014d3d093963    Row: 7 SQL error: -746(36071)    Error executing "update VoiceMessagingProfile set Name='Health Services Transfer to 6326' where pkid='7ec0d62d-2d3d-486f-9f3a-afe51e9e39b9'": [Informix][Informix ODBC Driver][Informix]Unspecified System Error =  -746. sqlerrm(36071)       pkid                         7ec0d62d-2d3d-486f-9f3a-afe51e9e39b9  NOT MODIFIABLE       Name                      Health Services Transfer to 6326       Description                           Health Services Transfer VM calls to 6326       fkVoiceMessagingPilot                VoiceMailBoxMask               6326       IsDefault                   false    NOT MODIFIABLE       resetToggle                          false       tkReset                    2       VersionStamp 0000000000-c7a6c673-7479-46b0-839e-014d3d093963    Row: 10 SQL error: -746(36071)    Error executing "update VoiceMessagingProfile set Name='Communications News Room' where pkid='e63f60d4-fe09-4d71-9852-c40b2d995cfe'": [Informix][Informix ODBC Driver][Informix]Unspecified System Error =  -746. sqlerrm(36071)       pkid                         e63f60d4-fe09-4d71-9852-c40b2d995cfe  NOT MODIFIABLE       Name                      Communications News Room       Description                           News RoomTransfer VM calls to 6991       fkVoiceMessagingPilot                VoiceMailBoxMask               6991       IsDefault                   false    NOT MODIFIABLE       resetToggle                          false       tkReset                   2       VersionStamp 0000000000-c7a6c673-7479-46b0-839e-014d3d093963 Solution: You need to  make sure that you have the names and description populated without any special characters and less than 24 characters in all. Also, You need to  delete if there is any unassigned DNs in your system. DMA Validation Fails While trying to perform DMA, you got this error "Export - Successful. Validation - Failed." Resolution After checking DMA logs found the following error: ========= ***> DATA PROCESSING TESTS REVEALED AN ISSUE WHICH GENERATED THE FOLLOWING EVENT:              The error number is:  [-391]            The error message is:  [-391    Cannot insert a null into column column-name.]             The following additional event information is available:                          This record was not processed because it is missing a required value.                        This could also be caused by specifying the value NULL in a required field.                      Suspected Field/Item Is [enduser.lastname] ========= This issue was occurred because there are some users in your system without last name/ sure name and this field is required so it shouldn't be NULL, after adding sure name, the problem is resolved. Related Information How to Upgrade CUCM 7.1.3 to 8.6 to a new server https://supportforums.cisco.com/thread/2169682?tstart=0#3727479 DMA Validation Fails ... View more