Memory Leak with Plist Serialization

Question

Please help me with this memory leak. In the leaks tool it shows a leak: NSCFString (32 bytes) in the library Foundation Responsible Frame: NSPropertyListSerialization. I am releasing the error but still a leak. What am I missing? Many thanks!

    NSPropertyListFormat format; 
    NSString *anError = nil;
    id plist;
    plist = [NSPropertyListSerialization propertyListFromData:rawCourseArray mutabilityOption:NSPropertyListImmutable format:&format errorDescription:&anError];
    if (!plist){
          [anError release];
    } 
    NSArray *entries = (NSArray *)plist;
    for (NSDictionary *entry in entries) 
    {
      // DO SOMETHING
    }

Answer 1

First, make sure that you are not using deprecated or obsolete method calls. Depending on your app configuration (this is for you to decide) you may be using obsolete method calls; from Apple docs:

propertyListFromData:mutabilityOption:format:errorDescription:

This method is obsolete and will be deprecated soon. (Deprecated. Use propertyListWithData:options:format:error: instead.)

I did not detect a memory leak after using the recommended api call... Test Code:

NSArray *somearray = @[@"One",@"Two",@"Three"];
NSData *rawCourseArray = [NSKeyedArchiver archivedDataWithRootObject:somearray];

NSPropertyListFormat format;
NSError *anError = nil;
id plist;
plist = [NSPropertyListSerialization propertyListWithData:rawCourseArray options:NSPropertyListImmutable format:&format error:&anError];
if (!plist){
    [anError release];
}
NSArray *entries = (NSArray *)plist;
for (NSDictionary *entry in entries)
{
    // DO SOMETHING
    NSLog(@"%@",entry);
}