I am using SBJson framework (also known as json-framework) for the iOS.
When parsing a certain JSON file, I am getting the following error: -JSONValue failed. E
If your file is having '\n' or '\r' kind of html qoutes then it may cause error in obj-c. You can add :
[jsonString stringByReplacingOccurrencesOfString:@"\r\n" withString:@""]
I was having same problem and solved using this.