Message type: E = Error
Message class:  CNV_MBT_46 - PCL message class 
Message number: 456
Message text: Some sender parameters not filled, domain/rollname of parameters unmatch
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_MBT_46456 indicates that there is an issue with the sender parameters in a data migration or conversion process. This error typically arises during the execution of a migration project, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: The error message "Some sender parameters not filled, domain/rollname of parameters unmatch" suggests that: Missing Parameters: Some required parameters for the sender are not filled in. This could be due to incomplete configuration or missing data in the migration settings. Domain/Rollname Mismatch: The domain or rollname of the parameters being used does not match the expected values. This could happen if there are discrepancies in the naming conventions or if the parameters are incorrectly defined.
Solution: To resolve this error, you can follow these steps: Check Sender Parameters: Go to the migration project or the relevant configuration settings. Ensure that all required sender parameters are filled in correctly. This includes checking for any mandatory
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_MBT_46455 Choose the parameter to be scrambled
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46454 Exporting parameter not maintained
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46457 Parameters are not properly maintained for autofilling
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46458 Either domain name or rollname should be maintained for all parameters
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.