Message type: E = Error
Message class:  CNV_10520 - Conversion module of FI-CA FIKEY-logic 
Message number: 029
Message text: Tax down payments and clearing accounts used in FI-CA
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_10520029 typically relates to issues with tax down payments and clearing accounts in the context of Financial Accounting (FI) and Contract Accounts Receivable and Payable (FI-CA). This error often arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: The error message CNV_10520029 indicates that there are inconsistencies or issues with the configuration of tax down payments and clearing accounts in the FI-CA module. Common causes include: Missing Configuration: The tax down payment accounts or clearing accounts may not be properly configured in the system. Data Inconsistencies: There may be inconsistencies in the data being migrated, such as incorrect account assignments or missing entries. Incorrect Mapping: During the migration process, the mapping of accounts may not align with the expected configuration in the target system. Transaction Types: The transaction types used for tax down payments may not be correctly set up or may
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_10520028 The last 7 characters of the field KONTL in the table DFKKSUM filled
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10520027 Failed to configure fields as 'Ignored'
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10520030 Context not found for 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...
CNV_10520031 Problems with CWB 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...
Click on this link to search all SAP messages.