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A "null" extension usually means that the file contains no data or is corrupted and/or was corrupted during the transmission of the file.
Windows cannot open this file because it does not know what the format is. There are a few software applications available to possibly convert the "null" to something readable, but those cost money and have only one purpose.
The best bet is to have the person who sent you that file resend it in another format ... possibly as a PDF as that seems to be a good universal application that most everyone can access.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoA null file is empty, there is nothing in it to open.
A text editor can usually open a null file, but there will be nothing to see.
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Cumpoter file how to open?
Depending on the format of the file, you often need a specialized program to open it. For example, to open a JPG (image) file, you need a program that can handle images, to open a Word document, you need Word (or other compatible programs), etc.You can often open the file by double-clicking on it (for example, in Windows Explorer); or you open the program that is supposed to use it, and give a command like "File | Open".Depending on the format of the file, you often need a specialized program to open it. For example, to open a JPG (image) file, you need a program that can handle images, to open a Word document, you need Word (or other compatible programs), etc.You can often open the file by double-clicking on it (for example, in Windows Explorer); or you open the program that is supposed to use it, and give a command like "File | Open".Depending on the format of the file, you often need a specialized program to open it. For example, to open a JPG (image) file, you need a program that can handle images, to open a Word document, you need Word (or other compatible programs), etc.You can often open the file by double-clicking on it (for example, in Windows Explorer); or you open the program that is supposed to use it, and give a command like "File | Open".Depending on the format of the file, you often need a specialized program to open it. For example, to open a JPG (image) file, you need a program that can handle images, to open a Word document, you need Word (or other compatible programs), etc.You can often open the file by double-clicking on it (for example, in Windows Explorer); or you open the program that is supposed to use it, and give a command like "File | Open".
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