Message type: E = Error
Message class:  CNV_10100 - Messages from package 10100 
Message number: 034
Message text: Error reading data for table &1 in client &2!
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_10100034, which states "Error reading data for table &1 in client &2," typically occurs during data migration or conversion processes, particularly when using SAP's Data Migration tools or during system upgrades. This error indicates that there was an issue accessing or reading data from a specific table in a specified client. Causes: Table Locking: The table may be locked by another process, preventing access. Authorization Issues: The user executing the migration may not have the necessary authorizations to read the data from the specified table. Data Corruption: There may be corruption in the data or the database that is preventing the read operation. Client-Specific Data: The data may not exist in the specified client, or the client may not be properly configured. Technical Issues: There could be underlying technical issues with the database or the SAP system itself. Solutions: Check Table Locks: Use transaction codes like SM12 to check for any locks on the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_10100033 Function &1 not yet supported!
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10100032 Target Client &1 already in use!
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10100035 Error while saving table &1 in save client &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_10100036 &1 Entries for table &2 added in save client &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.