objective c - iPhone Weird Error -

i getting following error:

[calayer superlayer]: message sent deallocated instance 0xb00afb0 

however isn't giving me stack trace when breaks have no idea doing this.

has 1 else ever had error or advise me better debugging techniques can further investigate?

you're over-releasing something. should turn on debugger trace error, or try running build/build , analyze. can catch it.