Duplicate Label

What does F019 mean?

This error signifies that a label or tag has been defined multiple times within the program or symbol table. This creates ambiguity, preventing the processor from uniquely identifying the intended variable or location.

• Two or more tags in the controller database share the same name.
• Programming error introducing a duplicate identifier.
• Importing a program component that contains an existing label.

Click steps to track your progress.

1. 1

   Verify the active PLC program by performing a software upload and comparing it against the last known good project file on the engineering workstation.

2. 2

   Access the PLC programming software (e.g., RSLogix 500 or Studio 5000 Logix Designer) and open the relevant project file.

3. 3

   Perform a 'Verify Project' or 'Compile' operation within the software to generate a comprehensive list of all F019 'Duplicate Label' instances and their exact locations.

4. 4

   Locate each identified duplicate label or tag within the PLC's tag database, symbol table, or program routines using the software's search and cross-reference tools.

5. 5

   Correct the duplicate entries by renaming or deleting one instance of each duplicated label/tag to ensure uniqueness, and then re-verify the project for error resolution.