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Editorial Team
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Asked: 2026-05-22T02:31:17+00:00

I am hitting the below error after I added 2 additional fields to my

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I am hitting the below error after I added 2 additional fields to my core data model.

CarPark_CarPark_ was deallocated while key value observers were still registered with it. Observation info was leaked, and may even become mistakenly attached to some other object. 
Set a breakpoint on NSKVODeallocateBreak to stop here in the debugger. 
Here's the current observation info:
<NSKeyValueObservationInfo 0x1b6510> (
<NSKeyValueObservance 0x19b210: Observer: 0x1a8cf0, Key path: coordinate, 
Options: <New: NO, Old:     NO, Prior: YES> Context: 0x0, Property: 0x1b7e00>
)

I am a little lost on what to do next. Any guidance on this will be greatly greatly appreciated! Please let me know what other information is required.

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1 Answer

  1. Editorial Team

    To set the breakpoint open the breakpoints tab in Xcode 4 (Breakpoints window in Xcode 3) and add a new symbolic Breakpoint for the symbol “NSKVODeallocateBreak”

    Use the debugger console to print the observer at the adress given in the observation info

    Observer: 0x19af20

    po 0x19af20

    This should give some valuable information about the observer.
    Override addObserver:forKeyPath:options:context: in your custom CarPark class and set a breakpoint to see the exact location of the observing being established.

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