Message type: E = Error
Message class:  CNV_20345_CHECK - Message Class for 20345 Checks 
Message number: 043
Message text: No merge of dummy PrCtr and non-dummy PrCtr detected
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_20345_CHECK043 indicates that there is an issue related to the merging of dummy and non-dummy Profit Centers (PrCtr) during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: The error occurs when the system detects that there is an attempt to merge a dummy Profit Center (which is often used for temporary or placeholder purposes) with a non-dummy Profit Center (which is an active and valid Profit Center). The merging of these two types of Profit Centers is not allowed because it can lead to inconsistencies in financial reporting and data integrity.
Solution: To resolve this error, you can take the following steps: Identify the Profit Centers: Check the Profit Centers involved in the merge operation. You need to identify which ones are dummy and which are non-dummy. Review Configuration: Ensure
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20345_CHECK042 Merge into COAr &1 without merge of dummy profit centers detected
What causes this issue?  A merge of controlling areas was detected but the mapping does not state that the corresponding dummy profit centers are merg...
CNV_20345_CHECK041 Dummy profit center &1 in controlling area &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20345_CHECK044 All Dummy PrCtr that are affected by the COAr merge are merged
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20345_CHECK045 Inactive Profit center exists:
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.