Message type: E = Error
Message class:  CNV20308 - SLO CWB Package Comparison 
Message number: 034
Message text: At this level, there are no messages to be confirmed
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 CNV20308034, which states "At this level, there are no messages to be confirmed," typically occurs during data migration or conversion processes, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other conversion tools.
Cause: This error generally indicates that the system is expecting confirmation of messages or entries that are not present at the current level of processing. This can happen due to several reasons: No Messages Available: There are genuinely no messages to confirm at the current stage of the process. Incorrect Process Step: The user may be trying to confirm messages at a point in the process where confirmation is not applicable. Data Issues: There may be issues with the data being processed, leading to a lack of messages to confirm.
Configuration Issues: The migration or conversion tool may not be configured correctly, leading to unexpected behavior.
Solution: To resolve this error, you can take
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20308033 Message was confirmed by mass confirmation
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20308032 Select at least one message for confirmation
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20308035 No logs for conversion programs found in package &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20308036 Data for package &1 was saved under ID &2 in directory &3
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.