Linked List remove node issue

[prihod]

Hi Everyone,
I am stuck at removing element from linked list. The error I get while compiling under linux is:

*** glibc detected *** free(): invalid next size (fast): 0x0804a028 ***

Error I get from windows is:

Windows has triggered a breakpoint in test1.exe.

This may be due to a corruption of the heap, and indicates a bug in test1.exe or any of the DLLs it has loaded.

The structure and function that I use to delete are:

typedef struct text *aText;
struct line {
    int size;
    char *text;
    aText next;
    aText prev;
};
void RemoveNode(aText node) {
	if (node!=NULL) {
		free(node->text);
		node->text=NULL;
		node->next=NULL;
		node->prev=NULL;
		node->size=0;
		free(node);
		node=NULL;
	}
}

When such an issue occurs? and what does it mean ?
Regards

[Salem]

If you have
A <-> B <-> C
and you remove B without first fixing A->next = C and C->prev = A, you end up with a broken list.

Further special care at the ends of the lists is required.