Viewing the images of documents printed on HP GDI printers

When you view documents printed on such GDI printers as HP Laser Jet 1018, HP Laser Jet 1020, etc., O&K Print Watch may report an “Unknown format” error.

To fix this error, do the following.

See also:

How to enable to store printed job shadow copy in O&K Print Watch.
How to store printed documents images on the hard drive instead SQL database.