Strange NSLog errors. Memory leaks

Question

When i running my app output shows me a lot of this strings:

2012-05-12 14:41:52.542 PermTour[1688:15c0b] *** __NSAutoreleaseNoPool(): Object 0x5c39520 of class NSCFString autoreleased with no pool in place - just leaking

And i know that the problem in this part of code. Because, when i comment it, output is empty.

 for(int i=0;i<[dataBase.allDataBase count];i++){
        aPLace = [dataBase.allDataBase objectAtIndex:i];
        name = [aPLace.name lowercaseString];
        description = [aPLace.description lowercaseString];
        if (!([name rangeOfString:searchText].location == NSNotFound) || !([description rangeOfString:searchText].location == NSNotFound)){
            [foundedPlaces addObject:aPLace];
        }

    }

Any ideas? Thnx

UPD.

When i comment all code and it looks like:

for(int i=0;i<[dataBase.allDataBase count];i++){
        aPLace = [dataBase.allDataBase objectAtIndex:i];
        name = [aPLace.name lowercaseString];
        //description = [aPLace.description lowercaseString];
        /*
        if (!([name rangeOfString:searchText].location == NSNotFound) || !([description rangeOfString:searchText].location == NSNotFound)){
            [foundedPlaces addObject:aPLace];
        }
         */

    }

Still memory leaking.. So what you think write now?

UPD 2

Answer 1

When you are dealing with a lot of data(memory), then it is always preferable to use NSAutoreleasePool.

EDIT -

-(returnType)yourMethod:(returnType)parameter @autoreleasepool
{
    @autoreleasepool
    {
         //method body.
    }
}

Hope this will help you.