Cocoa Error 1550 - Silicon Valley Gazette

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If you are getting Cocoa error 1550, this user guide was written to help you.

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I am trying to update an object and even save changes. I always get the following error:

  The process could not be completed. (Cocoa is confusing 1550.)

  - (BOOL) updateEvent: (EventDTO *) eventDTO    BOOL registered = YES;    [the same getDataCoreContext];    in case (context)        NSError * error;        Event * myEvent matches (Event *) [existing contextObjectWithID: eventDTO.entitysID error: & error];       myEvent.name = eventDTO.name;        myEvent.descrptn is eventDTO.description;        myEvent.date = eventDTO.date;        myEvent.locLatitude is equal to [eventDTO getLatidude];        myEvent.locLongitude = GetLongitude]; [eventdto myEvent.numberOfInvited = [NSNumber numberWithInteger: [number of eventDTO.invitedMembers]];        for * invUser (only for users in eventDTO.invitedMembers)            [myEvent addInvitedUsersObject: invUser];                for (user * accUser all before eventDTO.acceptedMembers)            [myEvent addAcceptedUsersObject: accUser];                myEvent.createdBy = (User *) [existing contextObjectWithID: eventDTO.creator.objectID error: & error];        it should be (! [save context: & error])            NSLog (@ "Sorry, could not log into the log:% @", [description of localized error]);            registered = NO;                Take away what has been saved;

This confuses me a lot because I don’t understand what the problem is.I also tried to fetch an object and change it. But exactly the same error. Error

Error

 : Domain = NSCocoaErrorDomain Code = 1550 “Institution could not be closed. (Cocoa error 1550.) "UserInfo = 0x14a00130 NSValidationErrorObject =  (Entity: Event; id: 0x166c0840  data    user accepted equal (    );    CreatedBy is "0x11024ae0 ";    Partner = "05/11/2013 16:15:09 +0000";    descrptn = Auauuauau;    guest user is (        "0x11069cd0 ",        "0x1104da60 ",        "0x1104da40 ",        "0x110687a0 ",        "0x1104da50 "    );    locLatitude = "51.45373916625977";   locLongitude = "7.264190196990967";    Nick = lALLALLa;    numberOfInvited is 5;), NSValidationErrorKey = guestUsers, NSLocalizedDescription = The process could not be completed. (Cocoa error 1550.), NSValidationErrorValue = Managed Object Relationship 'prohibitedUsers' (0x11024aa0)  (Entity: Event; ID: 0x166c0840 ",        "0x1104da60 ",        "0x1104da40 ",        "0x110687a0 ",        "0x1104da50 "    );    locLatitude means "51.45373916625977";   locLongitude matches "7.264190196990967";    name = lALLALLa;    guestNumber = 5;) with goals (    (Entity: User; id: 0x11069cd0 ; Data:    acceptEvents = "";    CreatedEvents means "";    Device info = null;    displayName stands for Daniel Higgins;    inviteToEvents equals (       "0x110abbb0 ",        "0x166c0840 ",        "0x110abba0 "    );    memberShipDetails is null;    phoneNumber means "555-478-7672";    realname = "Daniel Higgins";    status = "WAZZUUP?!";    User ID = null;),     (Entity: User; id: 0x1104da60 ; Data:    acceptEvents = "";    createdEvents = " ";    deviceInfo - zero;    displayName = "Hank Zakroff";    guestToEvents = (       "0x110abbb0 ",        "0x166c0840 ",        "0x110abba0 "    );    MemberShipDetails = zero;    Phone number = "(555) 766-4823";    realname = "Hank Zakroff";    status = "WAZZUUP?!";    User ID = null;),     (Entity: User; id: 0x1104da40 : Data:    AcceptedEvents is "";    createdEvents = "";    Device info = null;    displayName = "John's Apple Seed";    guestToEvents = (       "0x110abbb0 ",        "0x166c0840 ",        "0x110abba0 "    );    MemberShipDetails = zero;    Telephone number "888-555-5512";    realName stands for "John Appleseed";    Status means "WAZZUUP ?!" ;    userID is zero;),     (Entity: User; id: 0x110687a0 ; Data:    acceptEvents = "";    CreatedEvents is "";    deviceInfo is null;    displayName matchesthere is "Kate Bell";    inviteToEvents means (       "0x110abbb0 ",        "0x166c0840 ",        "0x110abba0 "    );    memberShipDetails means zero;    Phone number = "(555) 564-8583";    realname = "Keith Bell";    status = "WAZZUUP?!";    User ID = null;),     (Entity: User; id: 0x1104da50 ; data:    acceptEvents = "";    createdEvents = "";    deviceInfo is null;    displayName = "Anna Aro";    guestToEvents = (       "0x110abbb0 ",        "0x166c0840 ",        "0x110abba0 "    );    MemberShipDetails = zero;    Phone number = "555-522-8243";    realname = "Anna Aro";    Location = "WAZZUUP?!";    userID is zero;))

Judging by @ Sulthan’s nice explanation I found the problem.

In my to loops I had to check this even though the user already exists in this event:

  for (user * invUser in eventDTO.invitedMembers)   BOOL existsInInvitedList = [[eventDTO.invitedMembers valueForKeyPath: @ "objectID"] containsObject: invUser.objectID];    if (! existsGuestList)[myEvent addInvitedUsersObject: invUser];    for * accUser (user at eventDTO.acceptedMembers)    BOOL existInAcceptedList [[eventDTO = .acceptedMembers valueForKeyPath: @ "objectID"] containsObject: accUser.objectID];    when will it appear (! exists in the accepted list) [myEvent addAcceptedUsersObject: accUser];

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