When should I use CheckImage?
Similarly as Windows check your harddisk whenever you shutdown your system not properly, you should check your disk in this case. Disk Protection images are unmounted by logging out from Windows, so you don't have to check your disk if your system freezes after you log out. On the other hand data in the image can be also corrupted some other way than just by unsafe unmount (force unmount - see Disk Protection options). So if you have on your image valuable data, you should check your image from time to time during normal usage (at least once a month).
How can I prevent from errors in my images?
There are basically two ways how your image can be corrupted that you can in some cases prevent. The first way is as mentioned before when you shutdown the system without unmounting your image (which is done automaticaly by logging out). Sometimes you can avoid it but not always. The other way is when the disk or other medium on which is your image stored is somehow demaged. Hence you shouldn't store your image with some valuable data on an old and errorneous harddisk for instance.
What is the meaning of the texts in the "Error" column?
These texts are not very descriptive because they have to be short to fit in the narrow column. Each row contains a comma-separated list of errors that were found to this wrong item. Description of these errors is on the page
Description of error types in images
When I try to check an image, just a message "This file is already opened!" appears. What's wrong?
This message means that you try to check an image that is currently in use. In most cases is the problem that you haven't unmounted your image before you check it using CheckImage. You can't check an image that is mounted at the same time!
For what reason are there in the advanced mode the "FAT 1" and "FAT 2" buttons? I've opened an image but they're always grayed out.
These buttons can be used only if there is an inconsistency in FAT tables. Than you can switch between these two FAT tables (you choose the relevant one for repairing). If the FAT tables are consistent there's no reason to choose one of them, so the buttons are grayed out. More information about choosing the FAT table can be found
What can I do when CheckImage reports that "This image is far too corrupted, it can't be checked!" ?
This image is so corrupted that it can't be checked and also it can't most likely be mounted. In this case there's unfortunately no way to rescue your data saved in this image. You can just format it or create a new image.
If I try to run CheckImage on my CD-ROM, it displays an error in access to this file. What's happend?
This version of TP CheckImage requires Read-Write access to take control of the image. However CD-ROM device is designed for read-only usage therefore you can't repair images stored on CD-ROM. If you need to do this, copy your image to writable media and try the operation again.