Cannot open the data file

You can receive faxes automatically or manually. If you turn off the Auto Answer option, you must receive faxes manually. If you turn on the Auto Answer option (the default setting), the device automatically answers incoming calls and receives faxes after the number of rings that are specified by the Rings to Answer setting. (The default Rings to Answer setting is five rings.)
If you receive a legal-size fax and the device is not currently set to use legal-size paper, the device reduces the fax so that it fits on the paper that is loaded. If you have disabled the Automatic Reduction feature, the device prints the fax on two pages.
NOTE: If you are copying a document when a fax arrives, the fax is stored in the
device memory until the copying finishes. This can reduce the number of fax pages stored in memory.
This section contains the following topics:
• Receive a fax manually
• Set up backup fax reception
• Reprint received faxes from memory
• Poll to receive a fax
• Forward faxes to another number
• Set the paper size for received faxes
• Set automatic reduction for incoming faxes
• Block junk fax numbers
• Receive faxes to your computer (Fax to PC and Fax to Mac)
Receive a fax manually
When you are on the phone, the person you are speaking with can send you a fax while you are still connected. This is referred to as manual faxing. Use the instructions in this section to receive a manual fax.
NOTE: You can pick up the handset to talk or listen for fax tones.
You can receive faxes manually from a phone that is:
• Directly connected to the device (on the 2-EXT port)
• On the same phone line, but not directly connected to the device
NOTE: The automatic document feeder must be empty to receive a fax. If there are documents in the ADF, then the device will not be able to receive incoming faxes.
To receive a fax manually
1. Make sure the device is turned on and you have paper loaded in the input tray.
2. Remove any originals from the document feeder tray.
NOTE: The automatic document feeder must be empty to receive a fax. If there
are documents in the document feeder, then receiving the fax will be
unsuccessful.
3. Do one of the following to answer a fax manually:
• Set the Rings to Answer setting to a high number to allow you to answer the
incoming call before the device answers.
• Turn off the Auto Answer setting so that the device does not automatically
answer incoming calls.
4. If you are currently on the phone with the sender, instruct the sender to press Start on their fax machine.
5. When you hear fax tones from a sending fax machine, do the following:
a. Press START FAX Black or START FAX Color on the device control panel.
b. When prompted, select Fax Receive.
NOTE: Depending on your country/region, the device might receive the fax
automatically when you hear fax tones from the sending fax machine.
6. After the device begins to receive the fax, you can hang up the phone or remain on the line. The phone line is silent during fax transmission.

We've seen this error many times, and in most cases the problem is due to mismanagement of the send and receive logs. You probably have way too many faxes in your Receive Log (or, some corruption) You should read this

http://www.getfaxing.com/winfax/2009/08/18/organizing-your-faxes-with-the-winfax-pro-message-stores/

Hi
I have put a PDF files on my website for you to download.

Just click on the links it will download for you.
It got all you need to know in this file.
You can read it on site and print it strait off the website or save it to your PC then print it out.

Click LINK= http://www.4all2sell.com/pdf/Canon-PIXMA-MX310-Manaul.pdf

You will need a adobe reader to see this file If you not got an Pdf reader you can download it off this link free.
http://www.adobe.com/products/reader/

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
All files on my website are only there for a limited time

go to menu option and choose the option fax and set the parameter like auto receive or manual set the ring auto answer mode after certain ring. If it is in auto receiving mode it will receive the fax after the ring which you set.

clear the memory then in service mode

METER COUNT
STOP00 STOP01
PRESS 11
PRESS THE START KEY UNTIL CLR appears
THE PRESS the START key to blank it out the in will reappear
POWER off the machine wait ten seconds and power on

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

You have to go through your menu to fax functions & change it from manual to automatic.

Is the machine set to auto receive?

Try unplugging the power for a few seconds. This may clear any data that is "log jamming" the memory.

It may be that your CEO's fax machine is not setup to receive correctly. Have someone check the fax receive settings. Have them set it ot fax only and automatic receive.

Please remember to rate all users who assist you for free :)

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

that printer is sh**

Try changing the receive mode from automatic to FAX ONLY and set the number of fax rings higher. You should be able to receive phone calls and if you are not answering your phone it will automatically receive a fax.