Question about Nikon D40x Digital Camera

1 Answer

Message: Cant read file header.Unknown file format/file not found

I have downloaded a number of photographs onto the computer but when trying to open them, I keep getting the above message. Fortunately this doesn't apply to all the photos! I have tried using different software to open them i.e. Photoshop and Irfanview but still no luck. One photograph shows some picture and then the bottom half of the photo is just a block of grey? Can anyone help?

Posted by on

  • traceymgreen Jan 08, 2009

    Thanks for your reply. However the files are now all on the pc - not on the camera. Any further suggestions most welcome.


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 88 Answers

First check to see what the settings are set on how the files are saved. If they are set to RAW mode you won't be able to open them. Set the camera to jpg mode. Then you will be able to open them. The RAW mode is an advanced mode that requires an advanced operator to utilize all of the fuctions.

Posted on Jan 08, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer


Most cameras will not display images that were not taken on that camera (or at least a camera of the same brand). In addition, they will not display edited photographs. If you want to display edited photographs, you'll need to do it on the computer or a digital photo frame.

Jan 11, 2011 | Cameras


How to Recover Pictures From Fujifilm FinePix S700 Storage Media

With 7 mega pixel camera, 10x optical zoom, 2.5 LCD, picture stabilization mode, and i-Flash intelligent Flash, the Fujifilm FinePix S700 fulfills all the requirements of any photographer. The storage media (SD and xD memory cards) used in this camera allows the photographer to save audios, videos, and photos of different sizes. Damage in storage media can occur any time, resulting in fatal consequences, like inaccessibility of data saved in the memory card. In most cases, the photographer encounters an error message stating that the card is corrupted. To overcome such corruption scenarios, the photographer needs to restore the data from an updated backup. But all photographers do not create a backup on regular basis. For them, a third-party Camera recovery software acts as a boon and helps them recover the data.
As a real-world instance, you encounter the below error message while trying to view the pictures saved in your SD card (inserted in Fujifilm FinePix S700):
After the above error message pops up, the data saved in the SD card becomes inaccessible.
Few main causes for the above error message are:
1.Incorrect SD card format.
2.Incompatible SD card.
3.Memory card corruption due to unexpected camera shutdown, virus infection, and interrupted read or write operation.
To resolve the above error message and to access the data saved in SD card, you will need to:
1.Use a compatible SD card.
2.In case of memory card corruption, format the card in Fujifilm FinePix S700 camera. Though formatting brings the card in reusable state, all the audio, video, and picture files get deleted. To recover the deleted data, you will need to choose a powerful Camera recovery software.
Such recovery tools use effective scanning methods to ensure complete Camera data recovery. These tools can be downloaded from the Internet and used by anybody. Such applications are safe as they harm the original data saved in the memory card.
Digital camera recovery software is a world-renowned Photo Recovery utility used for recovering data from almost every type of memory card. This software ensures complete recovery of digital files, irrespective of their size or type. Compatible with Windows and Mac OS X, the read only software also recovers data from other storage media, like Zip drives, hard drives, etc.

on Jun 30, 2010 | Cameras


How to recover photos from memory card or hard drive

If you have accidentally deleted your photos from your camera or phones digital memory card or even your ipod or the HDD on your computer, there is still a reasonable chance of recovering them.

A full recovery is not guaranteed, but depending on the type of format that was used and particularly if it was a simple deletion of photographs it is quite often the case that photos can be recovered if the correct steps are taken.

First off - do not take any more photographs using the memory card in question.

The reason is, that should you overwrite the card with new photographs, some of the previous photograph information will be damaged and this will hamper the recovery operation.

If the photos have been lost from your memory card, you will need to have a card reader on your computer. If you have not got one of these, you can purchase a cheap multi-card usb reader that will do the job from the likes of Amazon or any hardware/computer store.
See this example.

Next, you will need to download and install a photo recovery program to your computer. There are several of these available to download for free from the net but for this purpose I am going to stick to one called Recuva which I have found to be easy to use and extremely comprehensive in its options. Recuva comes from a highly respected software company called Piriform and can confidently be recommended as free from Spyware, Adware or Viruses.

Best of all it is totally free to use and has no nags. You can download Recuva for free from this link.

Recuva is compatible with Windows 7, Vista, XP, 2003 and 2000. Including both 32-bit and 64-bit versions.

You may choose to search for an alternative recovery program on the Net if your operating system is not supported.

Download the program from the link provided above and then run the install wizard by clicking on the downloaded file. Follow the instructions to install the program on your computer. This program bundles Yahoo Tool Bar so please ensure to uncheck this option if you do not want this add on.

Insert your card into the card reader on your computer.

One distinct advantage to this program, is that it runs a wizard when you open it which walks you through the recovery process. Follow the instructions on the wizard and select the look for photographs option. Next select the "On my media card or Ipod option" to have it examine your card with the deleted photos.

If you want to scan your computers hard drive for deleted photos select that option instead.

Important: Click 'Enable Deep Scan' to have the best possible result from the scan. The program will automatically scan for recoverable files on the memory card in your card reader or hard drive as selected.

Be aware that this program is extremely thorough - and depending on the size of your card or drive, it may take some time to complete. Be patient as it completes its task. The program will then display the recovered photographs and give a comment beside each one to say if it has been damaged or is recoverable. Save the recovered photos onto a new file on your computer.

Once you have recovered and saved your photos - make sure to use your camera or device to format your memory card before using it again to capture photos.

A format will erase all data permanently from the card including corrupted data and so reduce the potential for future corruption of the card. This will help to avoid problems of this nature occuring again.

Thanks for reading this Tip and I do hope it has helped. If so, please do take a moment to register your vote for this Tip using the Yes/No buttons below.

on Jan 22, 2010 | Cameras

6 Answers

Canon Vixia HSF100 - I've successfully transferred video files in the past, and have just transferred photos from camera to computer without problem - but when I try to transfer video files I get the...

Are you are able to access to the files in your cam?
are yu able to play back the files in your cam.... if thats the case the possible cause could be your usb cable.... try changing the cable and see if that helps....

As a result of the above error, if you are unable to transfer the data onto the computer.....
FAT 16 doesn't support large number of directory entries plus it doesn't even allow long file names. A FAT 16 formatted SD card can hold a maximum of 512 entries in its root directories. The error can surface if the SD card already contains maximum number of files.
You can follow the below-mentioned steps in order to isolate the problem:
1) Create a sub-directory and copy all files to it
2) In future, remember not to assign long names to files
3) However, in order to completely resolve the issue, you must re-format the SD card in FAT 32 format. You can then restore the lost data by using the recent backup.
If you don't have a backup, you must acquire a digital camera recovery to retrieve photos and other files from your camera's SD card.
Such tools scan the formatted memory card thoroughly and extract data efficiently, irrespective of the type of memory card. Ensure you select a read-only camera recovery tool from the Internet.
Camera recovery software is a reliable and user-friendly application which recovers lost or deleted photos and other files from various camera brands including Kodak, Sony, Canon etc. The camera recovery utility recovers all photo, audio and video formats in just three simple steps.

Aug 21, 2010 | Cameras

2 Answers

Avi corrupt file when i transfer from camera onto computer

I'm assuming you use your camera and a USB cord to connect to your computer. When you finish, do you use the "safely remove hardware" icon on the bottom right of your screen or do you just yank out the cord? Yanking corrupts cards, files, and even cameras.

Jan 06, 2010 | Nikon Coolpix P50 Digital Camera

1 Answer

File contains no image data

If you format, you will lose everything...format means erase and optimize. Take your card to a store like Walmart that has a Kodak picture maker machine. It will usually read all the pics on a card and you can make a cd of them on the machine.

Nov 11, 2009 | Nikon COOLPIX L4 Digital Camera

2 Answers

Lumix Simple Viewer - Copying files to CD

I have "acquired" photographs from my Panasonic Lumix DMC-FX 8 using Lumix Simple Viewer onto my computer, and I am able to view them. However, I need them in a format that I can now copy them onto a CD or attach them as files to emails (without using the "Send by e-mail" function). I am sure this is simple, but is anyone able to help me?

Jan 21, 2008 | Panasonic Lumix DMC-TZ1 Digital Camera

Not finding what you are looking for?
Nikon D40x Digital Camera Logo

Related Topics:

89 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nikon Cameras Experts


Level 3 Expert

98694 Answers


Level 3 Expert

3287 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Nikon Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides