ios - objective-c pointer to 'int *' error when assigning data across relationships -

in tutorial http://www.raywenderlich.com/934/core-data-tutorial-for-ios-getting-started, author creates 2 classes failedbankinfo , failedbankdetails 2 core data entities, have relationship between them, , when assigns object failedbankdetails name of relationship details on failedbankinfo object/pointer this

failedbankinfo.details = failedbankdetails; 

it generates error

implicit conversion of objective-c pointer 'int *' disallowed arc 

and same error generated when assigns info.details pointer failedbankdetails * details

for (failedbankinfo *info in fetchedobjects) {     nslog(@"name: %@", info.name);     failedbankdetails *details = info.details;     nslog(@"zip: %@", details.zip); } 

can explain why happening?

this full code instructs reader insert applicationdidfinishlaunching

   nsmanagedobjectcontext *context = [self managedobjectcontext];     failedbankinfo *failedbankinfo = [nsentitydescription                                       insertnewobjectforentityforname:@"failedbankinfo"                                       inmanagedobjectcontext:context];     failedbankinfo.name = @"test bank";     failedbankinfo.city = @"testville";     failedbankinfo.state = @"testland";     failedbankdetails *failedbankdetails = [nsentitydescription insertnewobjectforentityforname:@"failedbankdetails"                                                 inmanagedobjectcontext:context];         failedbankdetails.closedate = [nsdate date];         failedbankdetails.updatedate = [nsdate date];         failedbankdetails.zip = [nsnumber numberwithint:12345];         failedbankdetails.info = failedbankinfo;         failedbankinfo.details = failedbankdetails;         nserror *error;         if (![context save:&error]) {             nslog(@"whoops, couldn't save: %@", [error localizeddescription]);         }          // test listing failedbankinfos store         nsfetchrequest *fetchrequest = [[nsfetchrequest alloc] init];         nsentitydescription *entity = [nsentitydescription entityforname:@"failedbankinfo"                                                   inmanagedobjectcontext:context];         [fetchrequest setentity:entity];         nsarray *fetchedobjects = [context executefetchrequest:fetchrequest error:&error];         (failedbankinfo *info in fetchedobjects) {             nslog(@"name: %@", info.name);             failedbankdetails *details = info.details;             nslog(@"zip: %@", details.zip);         } 

before generating classes entities, performed same task/test using managedobject , there no problem

nsmanagedobjectcontext *context = [self managedobjectcontext]; nsmanagedobject *failedbankinfo = [nsentitydescription     insertnewobjectforentityforname:@"failedbankinfo"     inmanagedobjectcontext:context]; [failedbankinfo setvalue:@"test bank" forkey:@"name"]; [failedbankinfo setvalue:@"testville" forkey:@"city"]; [failedbankinfo setvalue:@"testland" forkey:@"state"]; nsmanagedobject *failedbankdetails = [nsentitydescription     insertnewobjectforentityforname:@"failedbankdetails"     inmanagedobjectcontext:context]; [failedbankdetails setvalue:[nsdate date] forkey:@"closedate"]; [failedbankdetails setvalue:[nsdate date] forkey:@"updatedate"]; [failedbankdetails setvalue:[nsnumber numberwithint:12345] forkey:@"zip"]; [failedbankdetails setvalue:failedbankinfo forkey:@"info"]; [failedbankinfo setvalue:failedbankdetails forkey:@"details"]; nserror *error; if (![context save:&error]) {     nslog(@"whoops, couldn't save: %@", [error localizeddescription]); } nsfetchrequest *fetchrequest = [[nsfetchrequest alloc] init]; nsentitydescription *entity = [nsentitydescription     entityforname:@"failedbankinfo" inmanagedobjectcontext:context]; [fetchrequest setentity:entity]; nsarray *fetchedobjects = [context executefetchrequest:fetchrequest error:&error]; (nsmanagedobject *info in fetchedobjects) {     nslog(@"name: %@", [info valueforkey:@"name"]);     nsmanagedobject *details = [info valueforkey:@"details"];     nslog(@"zip: %@", [details valueforkey:@"zip"]); } 

that looks if "details" property of "failedbackinfo" declared as

@property (nonatomic) int *details; 

and not – should –

@property (nonatomic, retain) failedbankdetails *details;