ios - App crashes with output : "terminating with uncaught exception of type NSException (lldb) " -

the issue appears arise when connect outlets storyboard. if don't have them connected, can run app , runs - without showing in table. however, when connecting outlets brings error.

2014-11-19 15:35:45.477 2[2786:34838] -[to_do_2.firstviewcontroller tableview:numberofrowsinsection:]: unrecognized selector sent instance 0x7b660fd0 2014-11-19 15:35:45.488 2[2786:34838] *** terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[to_do_2.firstviewcontroller tableview:numberofrowsinsection:]: unrecognized selector sent instance 0x7b660fd0' *** first throw call stack: ( 0   corefoundation                      0x00212946 __exceptionpreprocess + 182 1   libobjc.a.dylib                     0x01beea97 objc_exception_throw + 44 2   corefoundation                      0x0021a5c5 -[nsobject(nsobject) doesnotrecognizeselector:] + 277 3   corefoundation                      0x001633e7 ___forwarding___ + 1047 4   corefoundation                      0x00162fae _cf_forwarding_prep_0 + 14 5   uikit                               0x00d0237f -[uisectionrowdata refreshwithsection:tableview:tableviewrowdata:] + 2803 6   uikit                               0x00d0673a -[uitableviewrowdata numberofrows] + 98 7   uikit                               0x00b31650 -[uitableview notenumberofrowschanged] + 175 8   uikit                               0x00b30b79 -[uitableview reloaddata] + 1782 9   uikit                               0x00b3532e -[uitableview _reloaddataifneeded] + 78 10  uikit                               0x00b3b317 -[uitableview layoutsubviews] + 36 11  uikit                               0x00ab0dd1 -[uiview(calayerdelegate) layoutsublayersoflayer:] + 608 12  libobjc.a.dylib                     0x01c04771 -[nsobject performselector:withobject:] + 70 13  quartzcore                          0x0469c28f -[calayer layoutsublayers] + 152 14  quartzcore                          0x04690115 _zn2ca5layer16layout_if_neededepns_11transactione + 397 15  quartzcore                          0x0469e5f6 -[calayer(calayerprivate) layoutbelowifneeded] + 44 16  uikit                               0x00aa2d52 -[uiview(hierarchy) layoutbelowifneeded] + 710 17  uikit                               0x00aa2a77 -[uiview(hierarchy) layoutifneeded] + 83 18  uikit                               0x00bc32a6 -[uitabbarcontroller _layoutviewcontroller:] + 312 19  uikit                               0x00bc3451 -[uitabbarcontroller _wrapperviewforviewcontroller:] + 248 20  uikit                               0x00bcb43e -[uitabbarcontroller transitionfromviewcontroller:toviewcontroller:transition:shouldsetselected:] + 454 21  uikit                               0x00bcaa62 -[uitabbarcontroller transitionfromviewcontroller:toviewcontroller:] + 64 22  uikit                               0x00bc6c55 -[uitabbarcontroller _setselectedviewcontroller:] + 340 23  uikit                               0x00bc6ad7 -[uitabbarcontroller setselectedviewcontroller:] + 193 24  uikit                               0x00bc36a2 __87-[uitabbarcontroller _selectdefaultviewcontrollerifnecessarywithappearancetransitions:]_block_invoke + 43 25  uikit                               0x00aa77af +[uiview(animation) performwithoutanimation:] + 82 26  uikit                               0x00bc354f -[uitabbarcontroller _selectdefaultviewcontrollerifnecessarywithappearancetransitions:] + 244 27  uikit                               0x00bc43a6 -[uitabbarcontroller viewwillappear:] + 148 28  uikit                               0x00b816e1 -[uiviewcontroller _setviewappearstate:isanimating:] + 545 29  uikit                               0x00b81c5a -[uiviewcontroller __viewwillappear:] + 148 30  uikit                               0x00b82fab -[uiviewcontroller viewwillmovetowindow:] + 395 31  uikit                               0x00aa12a8 -[uiview(hierarchy) _willmovetowindow:withancestorview:] + 662 32  uikit                               0x00aad92a -[uiview(internal) _addsubview:positioned:relativeto:] + 511 33  uikit                               0x00aa086e -[uiview(hierarchy) addsubview:] + 56 34  uikit                               0x00a749e3 -[uiwindow addrootviewcontrollerviewifpossible] + 512 35  uikit                               0x00a74c99 -[uiwindow _sethidden:forced:] + 287 36  uikit                               0x00a74f50 -[uiwindow _orderfrontwithoutmakingkey] + 49 37  uikit                               0x00a8328d -[uiwindow makekeyandvisible] + 80 38  uikit                               0x00a20776 -[uiapplication _callinitializationdelegatesformainscene:transitioncontext:] + 3108 39  uikit                               0x00a23c0d -[uiapplication _runwithmainscene:transitioncontext:completion:] + 1639 40  uikit                               0x00a3c7d0 __84-[uiapplication _handleapplicationactivationwithscene:transitioncontext:completion:]_block_invoke + 59 41  uikit                               0x00a2281f -[uiapplication workspacedidendtransaction:] + 155 42  frontboardservices                  0x035fe9de __37-[fbsworkspace clientendtransaction:]_block_invoke_2 + 71 43  frontboardservices                  0x035fe46f __40-[fbsworkspace _performdelegatecallout:]_block_invoke + 54 44  frontboardservices                  0x03610425 __31-[fbsserialqueue performasync:]_block_invoke + 26 45  corefoundation                      0x001361c0 __cfrunloop_is_calling_out_to_a_block__ + 16 46  corefoundation                      0x0012bad3 __cfrunloopdoblocks + 195 47  corefoundation                      0x0012b92b __cfrunlooprun + 2715 48  corefoundation                      0x0012abcb cfrunlooprunspecific + 443 49  corefoundation                      0x0012a9fb cfrunloopruninmode + 123 50  uikit                               0x00a221e4 -[uiapplication _run] + 571 51  uikit                               0x00a258b6 uiapplicationmain + 1526 52  2                             0x0002d7fe top_level_code + 78 53  2                             0x0002d83b main + 43 54  libdyld.dylib                       0x0235bac9 start + 1 55  ???                                 0x00000001 0x0 + 1 ) libc++abi.dylib: terminating uncaught exception of type nsexception (lldb)  

the first problem here:

[to_do_2.firstviewcontroller tableview:numberofrowsinsection:] 

you not telling how many rows each section need have. may need post code.