How To Fix COOPC402 - Error while writing OPC item &1; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: COOPC - Messages for SAP-OPC Integration

• Message number: 402

• Message text: Error while writing OPC item &1; see long text

What causes this issue?

The system tried to write a value to the OPC item &V1& that is defined
in plant &V2&. However, an internal error occurred that cannot be
specified any further.

System Response

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

How to fix this error?

You can try to correct the error by carrying out the following steps:
Test the connection to the RFC destination &V2& in Customizing.
To do so, go to Customizing for <LS>Production Planning - Process
Industries</> and choose <LS>Process Management</> -> <LS>SAP ODA (OPC
Data Access)</> -> <DS:SIMG.COOPC120>Define Settings for SAP ODA</>.
Try to access the OPC server via any
<DS:GLOS.34FECE44B0CAD411B11B0008C784EFB1>OPC client</> from another
vendor.
If this is possible, there is probably an program error in the SAP
system. Contact SAP.
If this is not possible, there is probably an error on the OPC server.
Contact the OPC server vendor.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message COOPC402 - Error while writing OPC item &1; see long text ?

  The SAP error message COOPC402 typically indicates an issue related to the OPC (OLE for Process Control) interface when trying to write to an OPC item. This error can occur in various scenarios, often related to configuration or communication issues between SAP and the OPC server.
  Cause:
  
  Configuration Issues: The OPC item may not be correctly configured in the SAP system or the OPC server.
  Network Issues: There may be network connectivity problems between the SAP system and the OPC server.
  Permissions: The user or service account may not have the necessary permissions to write to the OPC item.
  Item Availability: The OPC item may not be available or may not exist in the OPC server.
  Data Type Mismatch: There may be a mismatch between the data type expected by the OPC item and the data being sent from SAP.
  
  Solution:
  
  Check Configuration: Verify the configuration of the OPC item in both SAP and the OPC server. Ensure that the item name and parameters are correctly set.
  Test Connectivity: Use tools to test the network connection between the SAP system and the OPC server. Ensure that the OPC server is running and accessible.
  Review Permissions: Check the permissions for the user or service account that is attempting to write to the OPC item. Ensure it has the necessary rights.
  Validate OPC Item: Confirm that the OPC item exists and is available on the OPC server. You can use an OPC client tool to browse the items on the server.
  Check Data Types: Ensure that the data being sent from SAP matches the expected data type of the OPC item. If there is a mismatch, adjust the data accordingly.
  
  Related Information:
  
  SAP Documentation: Refer to the SAP Help Portal for detailed documentation on OPC integration and troubleshooting.
  OPC Server Logs: Check the logs of the OPC server for any additional error messages or warnings that could provide more context on the issue.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address known issues or provide patches related to OPC communication.
  Community Forums: Consider checking SAP Community forums or other technical forums for similar issues and solutions shared by other users.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage with SAP support or your system administrator for further assistance.