Message type: E = Error
Message class:  CNV_PE - General messages for posting engine 
Message number: 423
Message text: &1 records read. Max number is reached. Further records exist
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_PE423 indicates that a maximum limit of records has been reached during a data conversion or migration process. This error typically occurs in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer processes.
Cause: The error message suggests that the number of records being processed has exceeded a predefined limit set in the system. This limit is often configured to prevent performance issues or to manage memory usage during data processing. The message indicates that while the system has read a certain number of records (denoted by &1), it has reached the maximum allowed for the current operation.
Solution: To resolve this issue, you can consider the following steps: Check Configuration Settings: Review the configuration settings for the data migration or conversion process. Look for parameters that define the maximum number of records that can be processed in a single run. You
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_PE422 Worklist modification executed, but no action required according to TRule
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_PE421 Call of worklist modification TRule deactivated for area &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_PE424 Action '&1' unknown for worklist modification parameter &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_PE425 Parameter &1 does not exist
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.