Skip to main content

Troubleshooting

method Call Fails​

  1. Check Method Existence: Verify the method exists on the server
  2. Validate NodeIds: Ensure ObjectId and MethodId are correct
  3. Check Parameters: Verify input arguments match method signature - one property per argument, named exactly as the server declares it. The node names the argument it cannot find, and lists both what the method expects and what the payload holds. For a structure argument, see Passing a structure (ExtensionObject) argument.
  4. Verify Permissions: Ensure user has permission to call the method
  5. Check Server Status: Verify OPC UA server is running and accessible

node Status Indicators​

  • Green Dot: Method called successfully
  • Red Dot: Method call failed
  • Blue Dot: Method call in progress
  • Gray Dot: Node not connected/configured