Pervasive Status code 51 usually means the file is encrypted.

The documentation from Pervasive reads:

51: The owner name is invalid

The MicroKernel returns this status code for the following reasons:

• Unordered List ItemIf the application received this status code from a Set Owner operation, the owner names specified in the key buffer and data buffer do not match.
• If this status code occurred during an Open operation or a DROP TABLE statement, the application attempted to open a file that has an owner name assigned to it. The application must specify the correct owner name in the data buffer. Ensure that the owner name is null-terminated in the data buffer and that the data buffer length is set long enough to include the owner name plus the null terminator.

If you are working from with PCC you will need to de-crypt the table or use a SET OWNER statement to provide the necessary keys to access the contents of the file.