Thanks for trying, although it didn't help much! Tried what you suggested but no luck!
Once again, thanks anyway.
Best wishes, Marcus.
After speaking with CANON, the error message was caused by dirt on the ENCODER FILM, a clear plastic strip located inside and across the paper feed, the solution being to clean it with a mild solution of detergent and then with plain water and then dry it. Cotton swabs (buds) are recommended for cleaning/drying. Care should be taken not to damage the film and not to allow detergent/water to drip when cleaning.
I hope this is helpful to you should you receive a similar enquiry in the future.