ios - CoreData delete save Error -

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    [request2 setentity:entity];      nspredicate * predicate2 = [ nspredicate predicatewithformat:@"logoframenum == %@",[nsnumber numberwithint:7]];     [request2 setpredicate:predicate2];           nsmanagedobject * collectionlist2 = [[ managedobjectcontext executefetchrequest:request2 error:&error2] objectatindex:0];       nslog(@"context :%@", deletecontext1);     [managedobjectcontext deleteobject:collectionlist2];      bool yesorno = [collectionlist2 isdeleted];      nslog(@"yesorno : %i", yesorno);      nserror * error10;      nslog(@"[managedobjectcontext ] : %@", deletecontext1);      [collectionlist2 release];      if (![managedobjectcontext save:&error10]) {         // update handle error appropriately.         nslog(@"unresolved error %@, %@", error10, [error userinfo]);         exit(-1);  // fail      }

there more source above it. change variables or data coredata performed same nsmanagedobjectcontex have there. delete context makes me crazy. crashes without error message in 

if (![managedobjectcontext save:&error10]) {

i tried new context , on , on........a lot..

you performing release on object (collectionlist2) don't own. may cause crash later on (for example, during save). try removing release.


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