Using subroutines in a Function Module

Hi folks,
          Can i use perform statemetns in the source code of a function module...If i am using so...it showing an error message...Thanks...

What is the error you are getting..
FUNCTION zsflight.
  DATA:t_table TYPE table of sflight.
  SELECT * FROM sflight INTO TABLE i_sflight
        WHERE carrid EQ p_carrid
                    AND connid EQ p_connid.
perform get_data.
ENDFUNCTION.
Double click on the get_data it propose the includes to create the routine, just choose one ex..LXXXXXXXF01
***INCLUDE LZTEST1F01 .
*&      Form  get_data
*       text
*  -->  p1        text
*  <--  p2        text
form get_data .
endform.                    " get_data
and it will gernerrate the routine, add the code. and activate the whole function module and Function group.

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    Runtime Errors         SAPSQL_ARRAY_INSERT_DUPREC
    Except.                CX_SY_OPEN_SQL_DB
    ABAP Program           SAPLBSVU
    Application Component  CA-GTF-TS-SMT
    Date and Time          03/17/2014 07:01:29
    |Short text                                                                                        |
    |    The ABAP/4 Open SQL array insert results in duplicate database records.                       |
    |What happened?                                                                                    |
    |    Error in the ABAP Application Program                                                         |
    |                                                                                                  |
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    |    come across a statement that unfortunately cannot be executed.                                |
    |What can you do?                                                                                  |
    |    Note down which actions and inputs caused the error.                                          |
    |                                                                                                  |
    |                                                                                                  |
    |    To process the problem further, contact you SAP system                                        |
    |    administrator.                                                                                |
    |                                                                                                  |
    |    Using Transaction ST22 for ABAP Dump Analysis, you can look                                   |
    |    at and manage termination messages, and you can also                                          |
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    |    An exception occurred that is explained in detail below.                                      |
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    |                                                                                                  |
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    |    find an interim solution in an SAP Note.                                                      |
    |    If you have access to SAP Notes, carry out a search with the following                        |
    |    keywords:                                                                                     |
    |                                                                                                  |
    |    "SAPSQL_ARRAY_INSERT_DUPREC" "CX_SY_OPEN_SQL_DB"                                              |
    |    "SAPLBSVU" or "LBSVUU01"                                                                      |
    |    "STATUS_UPDATE"                                                                               |
    |                                                                                                  |
    |    If you cannot solve the problem yourself and want to send an error                            |
    |    notification to SAP, include the following information:                                       |
    |                                                                                                  |
    |    1. The description of the current problem (short dump)                                        |
    |                                                                                                  |
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    |    (Unconverted)".                                                                               |
    |                                                                                                  |
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    |    (Unconverted)".                                                                               |
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    |    3. If the problem occurs in a problem of your own or a modified SAP                           |
    |    program: The source code of the program                                                       |
    |       In the editor, choose "Utilities->More                                                     |
    |    Utilities->Upload/Download->Download".                                                        |
    |                                                                                                  |
    |    4. Details about the conditions under which the error occurred or which                       |
    |    actions and input led to the error.                                                           |
    |                                                                                                  |
    |    The exception must either be prevented, caught within proedure                                |
    |    "STATUS_UPDATE" "(FUNCTION)", or its possible occurrence must be declared in                  |
    |     the                                                                                          |
    |    RAISING clause of the procedure.                                                              |
    |    To prevent the exception, note the following:                                                 |
    |System environment                                                                                |
    |    SAP Release..... 702                                                                          |
    |    SAP Basis Level. 0010                                                                         |
    |                                                                                                  |
    |    Application server... "sds6ci"                                                                |
    |    Network address...... "11.224.101.53"                                                         |
    |    Operating system..... "Linux"                                                                 |
    |    Release.............. "2.6.18-194.el5"                                                        |
    |    Hardware type........ "x86_64"                                                                |
    |    Character length.... 16 Bits                                                                  |
    |    Pointer length....... 64 Bits                                                                 |
    |    Work process number.. 17                                                                      |
    |    Shortdump setting.... "full"                                                                  |
    |                                                                                                  |
    |    Database server... "gctsdb01lds.hsi.hugh"                                                     |
    |    Database type..... "ORACLE"                                                                   |
    |    Database name..... "DS6"                                                                      |
    |    Database user ID.. "SAPDS4"                                                                   |
    |                                                                                                  |
    |    Terminal.......... "GCTEMP02VDI"                                                              |
    |                                                                                                  |
    |    Char.set.... "C"                                                                              |
    |                                                                                                  |
    |    SAP kernel....... 720                                                                         |
    |    created (date)... "Sep 14 2013 05:28:14"                                                      |
    |    create on........ "Linux GNU SLES-9 x86_64 cc4.1.2 use-pr130820"                              |
    |    Database version. "OCI_102, 10.2.0.5.0, V2, default"                                          |
    |                                                                                                  |
    |    Patch level. 500                                                                              |
    |    Patch text.. " "                                                                              |
    |                                                                                                  |
    |    Database............. "ORACLE 10.1.0.*.*, ORACLE 10.2.0.*.*, ORACLE 11.2.*.*.*"               |
    |    SAP database version. 720                                                                     |
    |    Operating system..... "Linux 2.6, Linux 3"                                                    |
    |                                                                                                  |
    |    Memory consumption                                                                            |
    |    Roll.... 1317248                                                                              |
    |    EM...... 0                                                                                    |
    |    Heap.... 0                                                                                    |
    |    Page.... 0                                                                                    |
    |    MM Used. 1242912                                                                              |
    |    MM Free. 53400                                                                                |
    |User and Transaction                                                                              |
    |    Client.............. 160                                                                      |
    |    User................ "DV018458"                                                               |
    |    Language key........ "E"                                                                      |
    |    Transaction......... "SE38 "                                                                  |
    |    Transaction ID...... "5323C30FC9364665E10000000BE06533"                                       |
    |                                                                                                  |
    |    EPP Whole Context ID.... "002655EE0F241ED3ABB7D81260A28C44"                                   |
    |    EPP Connection ID....... 00000000000000000000000000000000                                     |
    |    EPP Caller Counter...... 0                                                                    |
    |                                                                                                  |
    |    Program............. "SAPLBSVU"                                                               |
    |    Screen.............. "RSM13000 3000"                                                          |
    |    Screen Line......... 2                                                                        |
    |    Debugger Active..... "none"                                                                   |
    |Information on where terminated                                                                   |
    |    Termination occurred in the ABAP program "SAPLBSVU" - in "STATUS_UPDATE".                     |
    |    The main program was "RSM13000 ".                                                             |
    |                                                                                                  |
    |    In the source code you have the termination point in line 60                                  |
    |    of the (Include) program "LBSVUU01".                                                          |
    |    The program "SAPLBSVU" was started in the update system.                                      |
    |    The termination is caused because exception "CX_SY_OPEN_SQL_DB" occurred in                   |
    |    procedure "STATUS_UPDATE" "(FUNCTION)", but it was neither handled locally nor                |
    |     declared                                                                                     |
    |    in the RAISING clause of its signature.                                                       |
    |                                                                                                  |
    |    The procedure is in program "SAPLBSVU "; its source code begins in line                       |
    |    1 of the (Include program "LBSVUU01 ".                                                        |
    |Source Code Extract                                                                               |
    |Line |SourceCde                                                                                   |
    |   30|  LOOP AT jsto_upd WHERE chgkz = 'X'.                                                       |
    |   31|    CHECK: jsto_upd-chgnr > '000',                                                          |
    |   32|           jsto_upd-stsma NE jsto_upd-stsma_old.                                            |
    |   33|    CLEAR jcdo_tab.                                                                         |
    |   34|    MOVE-CORRESPONDING jsto_upd TO jcdo_tab.                                                |
    |   35|    MOVE-CORRESPONDING chdat    TO jcdo_tab.                                                |
    |   36|    jcdo_tab-stsma_new = jsto_upd-stsma.                                                    |
    |   37|    APPEND jcdo_tab.                                                                        |
    |   38|  ENDLOOP.                                                                                  |
    |   39|* Änderungen zu Einzelstatus (Insert)                                                       |
    |   40|  LOOP AT jest_ins WHERE chgkz = 'X'.                                                       |
    |   41|    CHECK jest_ins-chgnr > '000'.                                                           |
    |   42|    CLEAR jcds_tab.                                                                         |
    |   43|    MOVE-CORRESPONDING jest_ins TO jcds_tab.                                                |
    |   44|    MOVE-CORRESPONDING chdat    TO jcds_tab.                                                |
    |   45|    jcds_tab-chind = 'I'.                                                                   |
    |   46|    APPEND jcds_tab.                                                                        |
    |   47|  ENDLOOP.                                                                                  |
    |   48|* Änderungen zu Einzelstatus (Update)                                                       |
    |   49|  LOOP AT jest_upd WHERE chgkz = 'X'.                                                       |
    |   50|    CHECK jest_upd-chgnr > '000'.                                                           |
    |   51|    CLEAR jcds_tab.                                                                         |
    |   52|    MOVE-CORRESPONDING jest_upd TO jcds_tab.                                                |
    |   53|    MOVE-CORRESPONDING chdat    TO jcds_tab.                                                |
    |   54|    jcds_tab-chind = 'U'.                                                                   |
    |   55|    APPEND jcds_tab.                                                                        |
    |   56|  ENDLOOP.                                                                                  |
    |   57|* Verbuchung Statusobjekte                                                                  |
    |   58|  DESCRIBE TABLE jsto_ins LINES sy-tabix.                                                   |
    |   59|  IF sy-tabix > 0.                                                                          |
    |>>>>>|    INSERT jsto CLIENT SPECIFIED                                                            |
    |   61|                FROM TABLE jsto_ins.                                                        |
    |   62|  ENDIF.                                                                                    |
    |   63|  DESCRIBE TABLE jsto_upd LINES sy-tabix.                                                   |
    |   64|  IF sy-tabix > 0.                                                                          |
    |   65|    field-symbols <fs_jsto_line> like jsto_upd.                                             |
    |   66|    loop at jsto_upd assigning <fs_jsto_line>.                                              |
    |   67|      IF <fs_jsto_line>-chgnr = '000'.                                                      |
    |   68|        <fs_jsto_line>-chgnr = '999'.                                                       |
    |   69|      ENDIF.                                                                                |
    |   70|* on change of status profile delete user status related to old profile                     |
    |   71|      IF <fs_jsto_line>-STSMA NE <fs_jsto_line>-STSMA_OLD.                                  |
    |   72|        DELETE FROM JEST CLIENT SPECIFIED WHERE                                             |
    |   73|               MANDT = <fs_jsto_line>-MANDT AND                                             |
    |   74|               OBJNR = <fs_jsto_line>-OBJNR AND                                             |
    |   75|               STAT  LIKE 'E%'.                                                             |
    |   76|        DELETE FROM JCDS CLIENT SPECIFIED WHERE                                             |
    |   77|               MANDT = <fs_jsto_line>-MANDT AND                                             |
    |   78|               OBJNR = <fs_jsto_line>-OBJNR AND                                             |
    |   79|               STAT  LIKE 'E%'.                                                             |

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    Short Text
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        stsma       = 'STATSCHEM'.
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      exporting
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        objnr_new = objektnummer_neu.
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