Business Graphic working but short dumping when 'No Data' is available

Question

Dear Experts,
I am trying to plot a graph (Bar chart) and it is working very well except when these is no data. In that instance instead of not displaying a data, it is giving short dump.
I am trying to plot a graph for a project from a list of the projects. In the Context, List of projects is a parent node while the cost data (used for drawing graph) is on child node. Both are with the cardinality of 0..n
When the project has cost data, graph is working beautifully but when the project does not have a cost data i get short dump.
Here is the what I get in Internet explorer.
The following error text was processed in the system UPG : Access via 'NULL' object reference not possible.
The error occurred on the application server SAPSANDPIT_UPG_00 and in the work process 2 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: IF_NW7_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/CBUSINESS_GRAPHICS======CP
Method: IF_NW7_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/C8STANDARD==============CP
Method: IF_NW7_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/C8STANDARD==============CP
Method: IF_NW7_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/C7STANDARD==============CP
Method: IF_WDR_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program CL_WDR_VIEW_ADAPTER===========CP
Method: IF_WDR_NW7_DELTA_RENDERER~CALCULATE_DELTA_BLOCKS of program CL_WDR_VIEW_ADAPTER===========CP
Method: IF_WDR_NW7_DELTA_RENDERER~CALCULATE_DELTA_BLOCKS of program CL_WDR_WINDOW_CONTENT_ADAPTER=CP
Method: SET_CONTENT of program CL_WDR_NW7_INT_WIN_ADAPTER====CP
Method: SET_CONTENT of program CL_WDR_NW7_MAIN_WIN_ADAPTER===CP
Method: IF_WDR_CLIENT~SEND_RESPONSE of program CL_WDR_CLIENT_SSR_LS==========CP
And here is what is in ST22
Runtime Errors         OBJECTS_OBJREF_NOT_ASSIGNED_NO
Exception              CX_SY_REF_IS_INITIAL          
Error analysis                                                                    
    An exception occurred that is explained in detail below.                      
    The exception, which is assigned to class 'CX_SY_REF_IS_INITIAL', was not     
     caught in                                                                    
    procedure "IF_NW7_VIEW_ELEMENT_ADAPTER~SET_CONTENT" "(METHOD)", nor was it    
     propagated by a RAISING clause.                                              
    Since the caller of the procedure could not have anticipated that the         
    exception would occur, the current program is terminated.                     
    The reason for the exception is:                                              
    You attempted to use a 'NULL' object reference (points to 'nothing')          
    access a component.                                                           
    An object reference must point to an object (an instance of a class)          
    before it can be used to access components.                                   
    Either the reference was never set or it was set to 'NULL' using the          
    CLEAR statement.                                                              
Problem is at following point
                                                                                mv_CHARTDATA = mv_DATA->create_simple_element( name = 'ChartData' parent = mv_DATA ). "#
*   >> END_UCA BUSINESS_GRAPHICS|BUSINESS_GRAPHICS|CHARTDATA                                                                               
*   >> Property: Get BUSINESS_GRAPHICS-SERIES_SOURCE                                       
    mv_SERIES_SOURCE =  get_bound_node( i_binding = wd_BUSINESS_GRAPHICS->bp_SERIES_SOURCE )
                                                                                *   >> Property: UCA BUSINESS_GRAPHICS-SERIES_ELEMENTS                                     
*   >> UCA BUSINESS_GRAPHICS|BUSINESS_GRAPHICS|SERIES_ELEMENTS                                                                               
mv_SERIES_ELEMENTS = mv_SERIES_SOURCE->get_elements( ).                                
*   >> END_UCA BUSINESS_GRAPHICS|BUSINESS_GRAPHICS|SERIES_ELEMENTS                                                                               
*   >> Property: UCA BUSINESS_GRAPHICS-SERIES_SOURCE_PATH                                  
*   >> UCA BUSINESS_GRAPHICS|BUSINESS_GRAPHICS|SERIES_SOURCE_PATH                          
mv_SERIES_SOURCE IN in above code is initial when data does not exists for a project.
Thanks in advance for your help.
ABAPer

Answer 1

Forgot to add following info from ST22
Information on where terminated                                                              
    Termination occurred in the ABAP program "/1WDA/CBUSINESS_GRAPHICS======CP" -            
     in "IF_NW7_VIEW_ELEMENT_ADAPTER~SET_CONTENT".                                           
    The main program was "SAPMHTTP ".                                                                               
In the source code you have the termination point in line 753                            
    of the (Include) program "/1WDA/CBUSINESS_GRAPHICS======CCIMP".                          
    The termination is caused because exception "CX_SY_REF_IS_INITIAL" occurred in           
    procedure "IF_NW7_VIEW_ELEMENT_ADAPTER~SET_CONTENT" "(METHOD)", but it was               
     neither handled locally nor declared                                                    
    in the RAISING clause of its signature.                                                                               
The procedure is in program "/1WDA/CBUSINESS_GRAPHICS======CP "; its source              
     code begins in line                                                                     
    390 of the (Include program "/1WDA/CBUSINESS_GRAPHICS======CCIMP ".                      
Thanks
ABAPer