Message type: E = Error
Message class:  CNV_10020 - Message class for package 10020 
Message number: 242
Message text: Multiple path &1: All altern. paths set to exlcude -> exclude was not set
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_10020242 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there are multiple paths defined for a particular data object, but all alternative paths have been set to "exclude," which means that the system cannot determine a valid path for processing the data.
Cause: Multiple Paths Defined: The error arises when there are multiple alternative paths for a specific data object, but all of them are marked to be excluded from processing.
Configuration Issues: This can happen due to incorrect configuration in the migration settings or mapping rules where all paths are inadvertently set to exclude. Data Model Changes: Changes in the data model or structure that are not reflected in the migration settings can also lead to this issue.
Solution: Review Migration Settings: Check the migration settings and ensure that at least one valid path
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_10020241 Multiple path &1: All alternative paths set to exclude -> exclude was set
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020240 Multiple path &1: All altern. paths set to exclude -> excl. would be set
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020243 All alternative paths can be used
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020244 Enter a relevant value
What causes this issue?  You entered an initial value.System Response  By default, the org package treats initial values as missing information. This ...
Click on this link to search all SAP messages.