objective-c - 不明なエラー: この時点で呼び出し元が所有していないオブジェクトの参照カウントのデクリメントが正しくありません

Question

次のエラーがあります。

Incorrect decrement of the reference count of an object that is not owned at this point by the caller

2行目にエラーが表示されます：

    TVConfigurationObject* config = [TVDeviceManger sharedTVDeviceManger].configuration;
    TVInitObj*initObj = config.initObj;

TVDeviceManger.h で:

....

 @property (nonatomic, retain) TVConfigurationObject *configuration;
 + (TVDeviceManger*) sharedTVDeviceManger;

....

TVDeviceManger.m で:

....

 + (TVDeviceManger*) sharedTVDeviceManger {
    static dispatch_once_t onceQueue;

    dispatch_once(&onceQueue, ^{
       sharedMyManager = [[TVDeviceManger alloc] init];
     });

    return sharedMyManager;
}

....

TVConfigurationObject.h:

....

 @property (nonatomic, retain) TVInitObj *initObj;

.... どうしたの？