dealloc called twice

Question

I have this case where i want to pop from a view and go back to the original view.
After the button is pressed the app crashes, and the console displays EXC_BAD_ACCESS.
I run it in instruments with zombies enabled and this is what i get: link to image

as it is shown the dealloc is called twice for the same object.
instruments are pointing to an NSMutableArraywhich contains NSStrings.

can anyone help me solve this issue... thank you.

ps: the solution provided in this question does not solve the issue.

Edit: the array is filled with data parsed from an xml file.

-(void) grabData{
    listOfNames=[[NSMutableArray alloc] init];


    NSString *XMLPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"chi.xml"];
    NSData *XMLData   = [NSData dataWithContentsOfFile:XMLPath];
    CXMLDocument *rssParser = [[[CXMLDocument alloc] initWithData:XMLData options:0 error:nil] autorelease];

    NSArray *items = [rssParser nodesForXPath:@"/template/item" error:nil];
    for (CXMLElement *node in items) {
        int counter;
        if([[[node attributeForName:@"type"] stringValue] isEqualToString:@"label"]){
            for(counter = 0; counter < [node childCount]; counter++) {
                [listOfNames addObject:[[node childAtIndex:counter] stringValue]];
            }
        }
...

and is used in this function:

-(void)setupPage{
    [scroll setCanCancelContentTouches:NO];
    scroll.indicatorStyle=UIScrollViewIndicatorStyleWhite;
    scroll.clipsToBounds=YES;
    scroll.scrollEnabled=YES;
    scroll.pagingEnabled=NO;
    int y=Y;
    CGFloat cy=0;
    int count=[listOfProperties count];
    int total=count;
    for(int i=0;i<count;i++){
        NSString *class=[[[NSString alloc] initWithFormat:@"%@",[(NSObject *)[listOfProperties objectAtIndex:i] class]] autorelease];
        if([class isEqualToString:@"textFieldCell"]){
            ((textFieldCell*)[listOfProperties objectAtIndex:i]).str=[listOfNames objectAtIndex:i];
            [((textFieldCell*)[listOfProperties objectAtIndex:i]) setTarget:scroll];
            ((textFieldCell*)[listOfProperties objectAtIndex:i]).view.frame=CGRectMake(X,y,self.view.frame.size.width - remProfX,cellProfH);
            [((textFieldCell*)[listOfProperties objectAtIndex:i]) setImage:[self getImageName:i maxValue:(count-1)]];
            [scroll addSubview:((textFieldCell*)[listOfProperties objectAtIndex:i]).view];
        }
        else{
            if([class isEqualToString:@"comboBoxCell"]){
                ((comboBoxCell*)[listOfProperties objectAtIndex:i]).str=[listOfNames objectAtIndex:i];
                [((comboBoxCell*)[listOfProperties objectAtIndex:i]) setTarget:self.view];
                ((comboBoxCell*)[listOfProperties objectAtIndex:i]).view.frame=CGRectMake(X,y,self.view.frame.size.width - remProfX,cellProfH);
                [((comboBoxCell*)[listOfProperties objectAtIndex:i]) setImage:[self getImageName:i maxValue:(count-1)]];
                [scroll addSubview:((comboBoxCell*)[listOfProperties objectAtIndex:i]).view];
            }
            else{
                if([class isEqualToString:@"dateCell"]){
                    ((dateCell*)[listOfProperties objectAtIndex:i]).str=[listOfNames objectAtIndex:i];
                    [((dateCell*)[listOfProperties objectAtIndex:i]) setTarget:self.view];
                    ((dateCell*)[listOfProperties objectAtIndex:i]).view.frame=CGRectMake(X,y,self.view.frame.size.width - remProfX,cellProfH);
                    [((dateCell*)[listOfProperties objectAtIndex:i]) setImage:[self getImageName:i maxValue:(count-1)]];
                    [scroll addSubview:((dateCell*)[listOfProperties objectAtIndex:i]).view];
                }
            }
...

dealloc:

- (void)dealloc {
    [listOfNames release];
    [listOfProperties release];
    [listOfGroupNames release];
    [listOfCheckBoxNames release];
    [listOfCheckBoxes release];
    [listOfButtons release];
    [scroll release];
    [super dealloc];
}

Answer 1

This might have happened if you created your NSArray as an autoreleased object using one of those methods:

+ array
+ arrayWithArray:
+ arrayWithContentsOfFile:
+ arrayWithContentsOfURL:
+ arrayWithObject:
+ arrayWithObjects:
+ arrayWithObjects:count:

And then in the dealloc method of your closing UIViewController you are releasing this array.

EDIT By the way class word is reseverd it's bad to use it like you did here:

NSString *class=[[[NSString alloc] initWithFormat:@"%@",[(NSObject *)[listOfProperties objectAtIndex:i] class]] autorelease];