How To Fix W0166 - An error occurred when the data for site &1 was being read

SAP Error Message - Details

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 166

• Message text: An error occurred when the data for site &1 was being read

What causes this issue?

An internal error has occurred.

System Response

INCLUDE ISR_VERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Check the site data for site &V1&. The error occurred when the function
module location_select_plant , which reads the site data, was called.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message W0166 - An error occurred when the data for site &1 was being read ?

  SAP Error Message:
  
  W0166 – "An error occurred when the data for site &1 was being read"
  
  Cause:
  This warning message typically occurs when SAP tries to read data related to a specific site (plant, storage location, or organizational unit) but encounters an issue. The cause can be one or more of the following:
  
  The site (plant or organizational unit) specified does not exist or is not maintained in the system.
  The site data is incomplete or inconsistent in the master data tables.
  Authorization issues preventing the system from reading the site data.
  Technical problems such as database inconsistencies or missing entries in related customizing tables.
  The site might be inactive or flagged for deletion.
  
  
  Solution:
  To resolve the W0166 warning, follow these steps:
  
  
  Check Site Master Data:
  
  Verify that the site (plant, storage location, etc.) exists in the system.
  Use transaction codes like OX10 (for plants), OX09 (for storage locations), or relevant customizing transactions to check the site data.
  Ensure the site is active and properly maintained.
  
  
  
  Check Authorizations:
  
  Confirm that the user has the necessary authorizations to access the site data.
  Use transaction SU53 immediately after the error to check for missing authorizations.
  
  
  
  Check Related Customizing:
  
  Verify that all related customizing entries for the site are maintained correctly.
  For example, check if the site is assigned to the correct company code, sales organization, or controlling area as required.
  
  
  
  Check for Data Consistency:
  
  Run consistency checks or database utilities if you suspect data corruption.
  Use transaction SE16/SE16N to inspect tables like T001W (plants), T001L (storage locations), or other relevant tables.
  
  
  
  Review Logs and Dumps:
  
  Check system logs (SM21), short dumps (ST22), or application logs (SLG1) for more detailed error information.
  
  
  
  Recreate or Correct Site Data:
  
  If the site data is missing or corrupted, recreate or correct it as per business requirements.
  
  
  
  Consult SAP Notes:
  
  Search the SAP Support Portal for notes related to message W0166 for any known issues or patches.
  
  
  
  
  Related Information:
  
  
  Message Class: W0 (General system messages)
  
  
  Common Transactions:
  
  OX10 – Maintain Plants
  OX09 – Maintain Storage Locations
  SPRO – Customizing (to check organizational structure)
  SU53 – Authorization check
  SE16/SE16N – Data browser for table checks
  SM21 – System log
  ST22 – ABAP runtime errors
  SLG1 – Application log
  
  
  
  Typical Scenario:
  
  This warning often appears during master data upload, data replication, or when running reports or transactions that require site-specific data.
  
  
  
  Impact:
  
  Usually a warning, but it may prevent certain processes from completing correctly if the site data is critical.
  
  
  
  
  If after these checks the problem persists, consider raising a support ticket with SAP, providing detailed information about the site, the transaction or process triggering the error, and any relevant logs or dumps.