Hi Guys,

we have upgraded our sisytem from NW 702 SP Stack 12 - 14. Before this upgrade the system worked correctly.

We use FPM_TABBED_UIBB to define tabs and each tab has different WD applications. Now we have a problem Access via 'NULL' object reference not possible when we want to change from a tab to another the second time. For example: I go to the tab1 and all is correct, then I go to tab2 and it works correctly but when I go back to the tab1 the system fails.

The dump stack is the next:

  22 METHOD       CL_WDR_COMPONENT==============CP    CL_WDR_COMPONENT==============CM01E     3

     CL_WDR_COMPONENT=>IF_WD_COMPONENT~GET_COMPONENT_INFO

  21 METHOD       CL_FPM_COMPONENT_MANAGER======CP    CL_FPM_COMPONENT_MANAGER======CM00A   336

     CL_FPM_COMPONENT_MANAGER=>GET_RELEASE_FEASIBILITY

  20 METHOD       CL_FPM========================CP    CL_FPM========================CM00P    51

     CL_FPM=>CALL_RESOURCE_MGR_ONHIDE

  19 METHOD       CL_FPM========================CP    CL_FPM========================CM005    77

     CL_FPM=>PROCESS_EVENT

  18 METHOD       CL_FPM========================CP    CL_FPM========================CM00C    34

     CL_FPM=>RUN_EVENT_LOOP

  17 METHOD       CL_FPM========================CP    CL_FPM========================CM002     5

     CL_FPM=>IF_FPM~RAISE_EVENT

  16 METHOD       CL_FPM_TABBED_ASSIST==========CP    CL_FPM_TABBED_ASSIST==========CM008    39

     CL_FPM_TABBED_ASSIST=>ONACTIONSELECT_TAB

  15 METHOD       /1BCWDY/0O2TIPOPNELM1MBN5PCA==CP    /1BCWDY/B_0O2TIPOPNELM1MD83UIC        583

     CL_TABBED_VIEW_CTR=>ONACTIONSELECT_TAB

     Web-Dynpro-Component          FPM_TABBED_UIBB

     Controller                    TABBED_VIEW

  14 METHOD       /1BCWDY/0O2TIPOPNELM1MBN5PCA==CP    /1BCWDY/B_0O2TIPOPNELM1MD83UIC        320

     CLF_TABBED_VIEW_CTR=>IF_WDR_VIEW_DELEGATE~WD_INVOKE_EVENT_HANDLER

     Web-Dynpro-Component          FPM_TABBED_UIBB

     Controller                    TABBED_VIEW

  13 METHOD       CL_WDR_DELEGATING_VIEW========CP    CL_WDR_DELEGATING_VIEW========CM006     6

     CL_WDR_DELEGATING_VIEW=>INVOKE_EVENTHANDLER

  12 METHOD       CL_WDR_ACTION=================CP    CL_WDR_ACTION=================CM00A    38

     CL_WDR_ACTION=>IF_WDR_ACTION~FIRE

  11 METHOD       CL_WDR_WINDOW_PHASE_MODEL=====CP    CL_WDR_WINDOW_PHASE_MODEL=====CM00U    95

     CL_WDR_WINDOW_PHASE_MODEL=>DO_HANDLE_ACTION_EVENTS

  10 METHOD       CL_WDR_WINDOW_PHASE_MODEL=====CP    CL_WDR_WINDOW_PHASE_MODEL=====CM002    85

     CL_WDR_WINDOW_PHASE_MODEL=>PROCESS_REQUEST

   9 METHOD       CL_WDR_WINDOW=================CP    CL_WDR_WINDOW=================CM00V    12

     CL_WDR_WINDOW=>PROCESS_REQUEST

   8 METHOD       CL_WDR_MAIN_TASK==============CP    CL_WDR_MAIN_TASK==============CM00I    76

     CL_WDR_MAIN_TASK=>EXECUTE

   7 METHOD       CL_WDR_MAIN_TASK==============CP    CL_WDR_MAIN_TASK==============CM00U     6

     CL_WDR_MAIN_TASK=>IF_WDR_RUNTIME~EXECUTE

   6 METHOD       CL_WDR_CLIENT_ABSTRACT_HTTP===CP    CL_WDR_CLIENT_ABSTRACT_HTTP===CM01C   100

     CL_WDR_CLIENT_ABSTRACT_HTTP=>HANDLE_REQUEST

   5 METHOD       CL_WDR_MAIN_TASK==============CP    CL_WDR_MAIN_TASK==============CM010    81

     CL_WDR_MAIN_TASK=>_HANDLE_REQUEST

4 METHOD       CL_WDR_MAIN_TASK==============CP    CL_WDR_MAIN_TASK==============CM00J    19

   CL_WDR_MAIN_TASK=>IF_HTTP_EXTENSION~HANDLE_REQUEST

3 METHOD       CL_HTTP_SERVER================CP    CL_HTTP_SERVER================CM01B   388

   CL_HTTP_SERVER=>EXECUTE_REQUEST_FROM_MEMORY

2 FUNCTION     SAPLHTTP_RUNTIME                    LHTTP_RUNTIMEU02                     1152

   HTTP_DISPATCH_REQUEST

1 MODULE (PBO) SAPMHTTP                            SAPMHTTP                               13

   %_HTTP_START

What is the source of this error? How could I solve that?

Bests,

Sergio.