This message, which typically occurs with MS-DOS compilers, means that you've written, via a null pointer, to an invalid location--probably offset 0 in the default data segment. (The pointer in question might have been uninitialized, although as we saw in question 1.30, not all uninitialized pointers necessarily start out as null pointers.) A debugger may let you set some kind of data watchpoint on location 0.

Not at all. Arrays are not pointers. A reference like x[3] generates different code depending on whether x is an array or a pointer.

Latest Answer: This error appears due to incorrect assignment to pointer and pointer tries to access illegal memory...

No. A null pointer is a pointer where all of the address bits are zero (no matter what the segment bits are), and can be obtained by typing '(char *) (int) 0'. A null statement is not a pointer to anything. They are not interchangeable, although you can combine them to get an effectively-null statement, such as NULL;. This does not buy you anything. [a] Send large donations, checks, and money orders to the author of the FAQ, or the moderator of the group, whichever you prefer.

How can I access an interrupt vector located at the machine's location 0? If I set a pointer to 0, the compiler might translate it to some nonzero internal null pointer value.

This message means that you do not have the proper version of DirectX installed on your computer. DirectX 7.0a is included on the Flux Deluxe CD-ROM. If you do not have the Deluxe CD-ROM, you can download DirectX from Microsoft here. This message means that you are not yet in our database. After your initial purchase of Flux, it will usually take 5-7 days for your email address to be added to our database.

We are aware that from time to time people are getting an error message that says "Error while setting device: NULL" and tells you to close the application and try again. There is no need to do anything but click on OK. Just ignore it and keep going. The cause of this message is proving to be elusive and harmless (yet annoying). We are working on it! This could be one of several problems. First, the Cherish Bound website uses Pop-ups to launch the book upload tool.

Latest Answer: NULL pointer is pointer which is not pointing to anything in the memory. NULL is defined as (v...

See /waffle/docs/network.doc , 'Managing UUCP and USENET', or Ian Taylor's UUCP Internals FAQ, posted to news.answers, for details.

EXTRACT's INSTALL utility does not work with certain recent Windows operating systems. If you get a run time error, simply follow these alternate installation instructions instead.

If you're calling image() inside your method, and the Animation doesn't have an image defined (if, for example, another Animation is nested inside of it), then image() will return null. You'll need to handle the case that image() returns null in order for your custom step method to work as a step method for a nested animation.

The language definition states that for each pointer type, there is a special value -- the "null pointer" -- which is distinguishable from all other pointer values and which is not the address of any object. That is, the address-of operator & will never yield a null pointer, nor will a successful call to malloc.

According to the language definition, a constant 0 in a pointer context is converted into a null pointer at compile time. That is, in an initialization, assignment, or comparison when one side is a variable or expression of pointer type, the compiler can tell that a constant 0 on the other side requests a null pointer, and generate the correctly-typed null pointer value.

When I try to print I get a message that says: Error opening report, Invalid directory -2147206460, Crystal reports ActiveX Designer Misc rpts. When I try to print I get a message that says: Error opening report, Invalid directory -2147206461, Crystal reports ActiveX Designer File not found Misc rpts.

A000038: You have not installed DANCAD3D.COM (tm) on your harddisk properly, or you do not have a complete set of overlay files on your set of program disks, or zip file. Unfortunately many of the program disks, or zip files, users pick up have files missing & therefore you will be unable to get the copy you have to work properly. Check that all the files named DANCAD3D.0?? have the same date as DANCAD3D.COM (tm), if not, your disks, or ZIP files, are not usable.

A null interface is an interface without any methods. Null interfaces are used to inform Java regarding what it can do with a class. For example, Serializable interface informs Java that objects of the implementing class can be serialized.

Latest Answer: NULL is a macro which contains the value 0 (on most implementations). this is the one used to initia...