Error Message: Load Paper is incorrect on Canon MultiPASS MP730 All-in-One InkJet Printer.

Check if you have loaded too many papers in the paper tray. If you have, just by removing some will take care of the error message.

There are two feeders on this MP730. There is the sheet feeder on top and there is the paper feeder on the back. You can have problems with both.

The sheet feeder on top.
If the problem is things go through somewhat sideways, and if this is the problem, stuff some postit notes between the back grey thing and the feeder tray to eliminate this problem. Add or subtract to the wad to make it right.

If the problem is it does not grip the sheet, what I used to do is to help it through by one sheet at a time, painful. I got frustrated with this so for scanning, I have a Snap Scan 1500, which is faster and better.

The paper feeder.
A small piece of paper left in the paper infeed path can cause a major problem. You cannot have anything in the paper path that will skew the paper, so you must get any little bit of restriction out of there.
As the printer gets older, you will have to produce your own guides to prevent this skewing, as the guides on the printer do not do this well. I use clamps and wooden guides to keep things in line.

You can open up the device and look inside. You'll prob ably find a jammed peice of paper or a paper clip or some obstacle inside jamming either the rollers or the track for the print head, or both.

Use a small flash light and check for any debris blocking the roller from the tray...

Take the tape off the new ink cartridges... It happens to me all the time.

Hello there Hi there you can try.
Following step by step resetting canon Pixma iP90 :

• Before resetting printer canon iP90, start with printer power off.
• Press resume button coincide with power button.
• While pressing power button, release resume button.
• Press resume button 2 times and then release both button
• Green LED indicator will blinking and then stopped blinking.
• When the Power LED lights in green, press resume button 4 times.
• Press power button and the printer power will off. Otherwise off, depress again power button.
• And the turn on the printer again, your printer canon iP90 should be response as normal.

You may not see a paper jam.

This may work for you, it has worked for many here I given this advice so gave it a try it could work for you. Generally when this happens, something has fallen into the printer, or a piece of paper has been jammed in there.

First step, remove the ink cartridge, and turn the printer upside down and gently shake it, see if anything comes out.

If nothing goes, or you can't hear anything rattling around, get a piece of cardstock paper (60lb or heavier) and gently push this through the printer, to see if it will help push out what might be stuck in there.
And gave the rode that the ink slides on a good clean and maybe a bit oil on cloth and wipe the rod with it.

Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

Hi
The manual is available in this site .....Follow the direction from it to access the paper path .....

http://www.fixya.com/support/p360581-canon_multipass_mp730_all_in_one_inkjet/manual-10204

Manuals for your printer can be found here.

My printer will print on every type of paper i set it to in the preferences, except "plain paper". the machine also doesn't copy when set to plain paper also. I printed a report cover on matte paper which printed fine, but when i change back to plain paper, it doesn't print.

This error will generate when the printhead holder cannot move. This is usually due to a paper jam. Clear the jam (or whatever might be obstructing it) and then press "Resume". Do NOT try to move the printhead holder manually. As for cleaning your printer, here is the owners guide from Canon. http://alpha03u.c-wss.com/inc/ApplServlet?SV=WWUCA900 Download the last link on the page. Hope this helps. Good luck.