-

Error (Data Integrity Check): The worksheet 'POUname:WSname' has no valid safety seal.

The seal of the worksheet (code or variables) mentioned in the error message is not valid. This may indicate a data corruption or manipulation.

Further Info
Refer to the topic "Safety Violation Messages and Data Integrity Errors" for background information.

Remedy

The error message relates to the content of the mentioned worksheet. Perform the steps described below and verify that the worksheet content is correct.

How to inspect the cause for a data integrity error message and confirm the verification

  1. In the Error List, double-click the error message to jump to the affected editor position.
    (Alternatively, select 'Jump' from the context menu.)
  2. Inspect the affected data in the corresponding editor and verify its correctness.

    • If the data is not correct, try to correct it. In case of a systematic error and if no correction is possible, the project is damaged and cannot be used any longer. The data integrity error will persist and the project cannot be built.

      You can then try to copy the data into a newly created project.

    • If the data is correct, you can eliminate the data integrity error message by right-clicking the affected editor position and selecting the 'Confirm Verification' command from the context menu.

      The data integrity error message is deleted and the project can be built again.