Message type: E = Error
Message class:  CNV_CDMC_UCIA - CDMC Upgrade/Change Impact Analysis 
Message number: 135
Message text: The selected Project is not a UCIA project
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNV_CDMC_UCIA135 indicates that the selected project is not recognized as a UCIA (Unified Change Impact Assessment) project. This error typically arises in the context of data migration or transformation projects within SAP systems, particularly when using tools like SAP S/4HANA Migration Cockpit or other data conversion tools.
Cause: Project Type Mismatch: The project you are trying to access or work with is not configured as a UCIA project. This could happen if the project was created without the necessary settings or if it was intended for a different purpose. Incorrect Project Selection: You may have selected the wrong project from the list, which does not meet the criteria for UCIA.
Configuration Issues: There may be issues with the configuration of the project or the system that prevent it from being recognized as a UCIA project.
Solution: Verify Project Type: Check the project settings to ensure that it is indeed a UCIA project.
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CDMC_UCIA134 Select a Project ID
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_UCIA133 Maintenance of Actual Adjustment Time is specific to a customer object
What causes this issue?  You tried to change the results displayed in compressed view.System Response  If the current system is a solution manager sys...
CNV_CDMC_UCIA136 You are currently working in project &1. Select any other project
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_UCIA137 Activity 'Perform Remote Comparison' not completed for selected project
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.