Invalid Import File Signature

What does NTE_BAD_SIGNATURE mean?

The file specified for import does not contain a valid tree item or has a corrupted signature (0x80090006). This error occurs when ImportChild() attempts to read the file but determines its content is not a recognized TwinCAT tree item export format.

• The signature of the import or firmware file is invalid or corrupted.
• The file has been tampered with, and its integrity check failed.
• The checksum of the imported data does not match the expected value.

Click steps to track your progress.

1. 1

   Ensure the bstrFile was generated by ExportChild() from a valid TwinCAT tree item.

2. 2

   Attempt to open the export file (.tce) with a text editor to check for obvious corruption or non-XML content.

3. 3

   Regenerate the export file from the source TwinCAT configuration if possible, ensuring a valid export process.