VOWELMOVEMENT example crashes. Please help!


Hi everyone,
I am currently working through the VOWELMOVEMENT example in Chapter 32.
I have typed the example exactly as it appears in the book but I get the following error message:

error: receiver type ‘NSMutableString’ for instance message does not declare a method with selector ‘replaceOccurencesOfString:withString:options:range:’ [4]

Any suggestions???



“Occurrences” has two R’s.