Run time error in RFC

Question

Hi,
     run time error occur in RFC when i try  to create,change and opening  the  rfc connections(like abap connections).its showing run time error : RAISE_EXCEPTION. SHORT DECCRIPTION :EXCEPTION CONDITION  DP _ERROR RAISED.
PLEASE HELP ME TO SOLVE THIS PROBLEM.

Answer 1

Information on where terminated
    Termination occurred in the ABAP program "CL_ALV_TREE_BASE==========
     in "GET_FRONTEND_FIELDCATALOG".
    The main program was "SAPMCRFC ".
    In the source code you have the termination point in line 23
    of the (Include) program "CL_ALV_TREE_BASE==============CM00D".
Trigger Location of Runtime Error
    Program                                 CL_ALV_TREE_BASE==============CP
    Include                                 CL_ALV_TREE_BASE==============CM00D
    Row                                     23
    Module type                             (METHOD)
    Module Name                             GET_FRONTEND_FIELDCATALOG
Source Code Extract
Line  SourceCde
    1
    2 method get_frontend_fieldcatalog.
    3
    4 * exit in batch mode
    5   if not m_batch_mode is initial.
    6     et_fieldcatalog[] = mt_fieldcatalog[].
    7     exit.
  8   endif.
9
10 * get column orders
11   data l_columns type treev_cona.
12   call method mr_column_tree->get_column_order
13               changing
14                   columns = l_columns
15               exceptions
16                   cntl_system_error = 1
17                   dp_error          = 2
18                   failed            = 3.
19   case sy-subrc.
20     when 1.
21       raise cntl_system_error.
22     when 2.
>>       raise dp_error.
24     when 3.
25       raise failed.
26   endcase.
27
28 * get columns
29   types: begin of lt_width_type,
30            h_col_key type lvc_s_fcat-h_col_key,
31            width type i,
32          end of lt_width_type.
33   data: lt_width type table of lt_width_type,
34         l_width type lt_width_type.
35   field-symbols: <ls_fieldcatalog_wa> type lvc_s_fcat.
36   l_width-width = 0.
   37   loop at mt_fieldcatalog assigning <ls_fieldcatalog_wa>
   38                           where no_out <> 'X' and
   39                                 tech is initial.
   40     l_width-h_col_key = <ls_fieldcatalog_wa>-h_col_key.
   41     append l_width to lt_width.
   42   endloop.