How To Fix UJ0_EXCEPTION001 - Data cannot be read

SAP Error Message - Details

• Message type: E = Error

• Message class: UJ0_EXCEPTION - Basic Exception Messages

• Message number: 001

• Message text: Data cannot be read

Self-Explanatory Message

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message UJ0_EXCEPTION001 - Data cannot be read ?

  The SAP error message UJ0_EXCEPTION001, which indicates that "Data cannot be read," typically arises in the context of SAP BW (Business Warehouse) or SAP HANA environments. This error can occur for various reasons, and understanding the cause is crucial for finding an appropriate solution. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Data Source Issues: The data source from which the data is being read may be unavailable or incorrectly configured.
  Authorization Problems: The user may not have the necessary authorizations to access the data.
  Data Model Issues: There may be inconsistencies or errors in the data model, such as missing or incorrect mappings.
  Network Issues: Connectivity problems between the SAP system and the data source can lead to this error.
  Data Locking: The data might be locked by another process, preventing access.
  System Performance: High load on the system or performance issues can lead to timeouts or failures in data retrieval.
  
  Solutions:
  
  Check Data Source Configuration: Ensure that the data source is correctly configured and available. Verify the connection settings and test the connection.
  Review Authorizations: Check the user roles and authorizations to ensure that the user has the necessary permissions to access the data.
  Validate Data Model: Review the data model for any inconsistencies or errors. Ensure that all necessary mappings and transformations are correctly set up.
  Network Connectivity: Check for any network issues that might be affecting connectivity to the data source. Ensure that firewalls or other security settings are not blocking access.
  Monitor Data Locks: Use transaction codes like SM12 to check for any locks on the data that might be preventing access. If locks are found, determine the cause and resolve them.
  System Performance: Monitor system performance and resource usage. If the system is under heavy load, consider optimizing queries or increasing system resources.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), ST22 (Dump Analysis), and SM37 (Job Monitoring) to diagnose issues.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address specific issues related to this error message.
  Logs and Traces: Review application logs and traces for more detailed error messages that can provide additional context for troubleshooting.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further investigation and support.