crash log:

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread:  7

Application Specific Information:
abort() called
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Printing failed because PMSessionEndDocumentNoDialog() returned -30871.'

Thread 7 Crashed:
0   libSystem.B.dylib             	0x00007fff837d59ce __semwait_signal_nocancel + 10
1   libSystem.B.dylib             	0x00007fff837d58d0 nanosleep$NOCANCEL + 129
2   libSystem.B.dylib             	0x00007fff838323ce usleep$NOCANCEL + 57
3   libSystem.B.dylib             	0x00007fff83851a00 abort + 93
4   libstdc++.6.dylib             	0x00007fff8791f5d2 __tcf_0 + 0
5   libobjc.A.dylib               	0x00007fff8116cb39 _objc_terminate + 100
6   libstdc++.6.dylib             	0x00007fff8791dae1 __cxxabiv1::__terminate(void (*)()) + 11
7   libstdc++.6.dylib             	0x00007fff8791db16 __cxxabiv1::__unexpected(void (*)()) + 0
8   libstdc++.6.dylib             	0x00007fff8791dbfc __gxx_exception_cleanup(_Unwind_Reason_Code, _Unwind_Exception*) + 0
9   libobjc.A.dylib               	0x00007fff81168fa2 object_getIvar + 0
10  com.apple.CoreFoundation      	0x00007fff800b45d7 +[NSException raise:format:arguments:] + 103
11  com.apple.CoreFoundation      	0x00007fff800b4564 +[NSException raise:format:] + 148
12  com.apple.AppKit              	0x00007fff8556086e -[NSPrintSpoolingGraphicsContext dealloc] + 37
13  com.apple.CoreFoundation      	0x00007fff80030fc3 __CFArrayReleaseValues + 435
14  com.apple.CoreFoundation      	0x00007fff8000eaa3 _CFRelease + 179
15  com.apple.AppKit              	0x00007fff8500b53d __NSAppKitFinalizeThreadData + 260
16  libSystem.B.dylib             	0x00007fff8379c751 _pthread_tsd_cleanup + 187
17  libSystem.B.dylib             	0x00007fff8379c39c _pthread_exit + 147
18  com.apple.Foundation          	0x00007fff83bd227f __NSFinalizeThreadData + 0
19  com.apple.Foundation          	0x00007fff83bd2217 __NSThread__main__ + 1448
20  libSystem.B.dylib             	0x00007fff8379bfd6 _pthread_start + 331
21  libSystem.B.dylib             	0x00007fff8379be89 thread_start + 13

<pre lang="objc">
OffscreenView 	*view = [[OffscreenView alloc] initWithImage:myimage];
    
    
    NSRect			rect = [view bounds];
    NSData 			*data = [view dataWithPDFInsideRect:rect];
NSImage			*image_bar = [[NSImage alloc] initWithData:data];

 - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(messageReceived:) name:MessageRecivedNotif object:nil];

appdelegate=(AppDelegate*)[[UIApplication sharedApplication] delegate];
[self getAllMessagesArrayWithOppositeUser:_jid];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWasShown:)
                                             name:UIKeyboardDidShowNotification
                                           object:nil];


}

#pragma mark table delegate and datasource methods
 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return data.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tblobj dequeueReusableCellWithIdentifier:@"cell"];
UILabel *lbl;
if (cell==nil)
{
    cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];

    if (chatLblRight == 1)
    {
        lbl = [[UILabel alloc]initWithFrame:CGRectMake(200, 10, 150, 44)];
        [lbl setTextColor:[UIColor redColor]];
        [cell.contentView   addSubview:lbl];
    }


 }
 if (chatLblRight == 1)
 {
    lbl.text = [[data objectAtIndex:indexPath.row]valueForKey:@"text"];
    chatLblRight = 0;
    lbl = [[UILabel alloc]initWithFrame:CGRectMake(200, 10, 150, 44)];
    [lbl setTextColor:[UIColor redColor]];
    [cell.contentView   addSubview:lbl];

    return cell;
  }
  else
  {
    cell.textLabel.text=[[data objectAtIndex:indexPath.row]valueForKey:@"text"];
    return cell;
  }
}
-(void)messageReceived:(NSNotification*)notif
{
XMPPMessage *message=(XMPPMessage*)notif.object;
NSString *body = [[message elementForName:@"body"] stringValue];
NSMutableDictionary *dic_recive = [[NSMutableDictionary alloc]init];
[dic_recive setObject:body forKey:@"text"];
[data addObject:dic_recive];
chatLblRight = 1;
[tblobj reloadData];
}
 -(IBAction)btnsend:(id)sender
{
[txtmsg resignFirstResponder];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.2];
[msgview setFrame:CGRectMake(0, self.view.bounds.size.height-53, self.view.bounds.size.width, 53)];
[UIView commitAnimations];
[((AppDelegate*)[[UIApplication sharedApplication]delegate]) sendMessage:txtmsg.text toUserWithJid:_jid];
NSMutableDictionary *dic_send = [[NSMutableDictionary alloc]init];
[dic_send setObject:txtmsg.text forKey:@"text"];
[data addObject:dic_send];
[tblobj reloadData];
txtmsg.text=@"";
 }
-(NSMutableArray *)getAllMessagesArrayWithOppositeUser:(XMPPJID *)xmppUser
{
XMPPMessageArchivingCoreDataStorage *storage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
NSManagedObjectContext *moc = [storage mainThreadManagedObjectContext];
NSEntityDescription *entityDescription = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Message_CoreDataObject"
                                                     inManagedObjectContext:moc];
NSFetchRequest *request = [[NSFetchRequest alloc]init];
[request setEntity:entityDescription];
NSError *error;
NSArray *messages = [moc executeFetchRequest:request error:&error];

data=[[NSMutableArray alloc] init];

@autoreleasepool {
    for (XMPPMessageArchiving_Message_CoreDataObject *message in messages) {

        if ([message.bareJid isEqual:xmppUser])
        {
            NSMutableDictionary *dict=[[NSMutableDictionary alloc] init];
            [dict setObject:message.body forKey:@"text"];
            [dict setObject:message.timestamp forKey:@"date"];
            if ([message isOutgoing]) {
                [dict setObject:@"1" forKey:@"type"];
                [dict setObject:[[message.bareJidStr componentsSeparatedByString:@"@"] firstObject] forKey:@"username"];
                [dict setObject:[UIColor greenColor] forKey:@"color"];
            }
            else{

                [dict setObject:@"2" forKey:@"type"];
                [dict setObject:[[message.bareJidStr componentsSeparatedByString:@"@"] firstObject] forKey:@"username"];
                //                    [dict setObject:userName forKey:@"username"];
                [dict setObject:[UIColor blueColor] forKey:@"color"];
             }
            [data addObject:dict];
          }
      }
  }

   return data;
}

- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message
{
    
    DDLogVerbose(@"%@: %@", THIS_FILE, THIS_METHOD);
[[self xmppStream] sendElement:message];
    
    UILocalNotification *localNotification = [[UILocalNotification alloc] init];
    localNotification.alertAction = @"OK";
    localNotification.fireDate = [NSDate date];
    //localNotification.alertBody = xmppmessage;
    localNotification.soundName = UILocalNotificationDefaultSoundName;
    [[UIApplication sharedApplication] presentLocalNotificationNow:localNotification];

    
    
    
    // A simple example of inbound message handling.
    
   if ([message isChatMessageWithBody])
    {
        XMPPUserCoreDataStorageObject *user = [xmppRosterStorage userForJID:[message from]
                                                                 xmppStream:xmppStream
                                                       managedObjectContext:[self managedObjectContext_roster]];
        
        NSString *body = [[message elementForName:@"body"] stringValue];
        NSString *displayName = [user displayName];
        
        if ([[UIApplication sharedApplication] applicationState] == UIApplicationStateActive)
        {
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:displayName
                                                                message:body
                                                               delegate:nil
                                                      cancelButtonTitle:@"Ok"
                                                      otherButtonTitles:nil];
            [alertView show];
        }
        else
        {
            // We are not active, so use a local notification instead
            UILocalNotification *localNotification = [[UILocalNotification alloc] init];
            localNotification.alertAction = @"Ok";
            localNotification.alertBody = [NSString stringWithFormat:@"From: %@\n\n%@",displayName,body];
            
            [[UIApplication sharedApplication] presentLocalNotificationNow:localNotification];
        }
    }

import <uikit uikit.h="">

• (IBAction)convertButtonPressed:(UIButton *)sender;

import "ViewController.h"

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  }
• (void)didReceiveMemoryWarning {
  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.
  }
• (IBAction)convertButtonPressed:(UIButton *)sender
  {
  float humanYears = [self.humanYearsTextField.text floatValue];
  float numberOfDogYears = humanYears * 7;
  self.dogYearLabel.text = [NSString stringWithFormat:@"%.0f years", numberOfDogYears];