Wrong data after sub vi executes

Hello,
I am working on a control vi that (in part) monitors the status of some solenoids and checks that they have actuated (or not) appropriately.  As part of this, I have created a subVI that reads in if the solenoid is supposed to be active, takes a sample reading, and outputs whether or not the sensors are reading that the solenoid is in the proper position.  In the main VI, I then write to a boolean control via a local variable.  I know, your immediate thought is "another race condition issue"... that might be the case, but please read on.  If it is, I'd love to understand why.
The subVI works flawlessly when executed on its own.  It also works correctly when debugging either using highlight execution or with breakpoints and single-stepping through everything.  Using the probe feature and running normally, I know I'm getting the right input to the subVI, but for some reason the subVI then provides me with the wrong output when I probe the other side.  I don't believe it to be a race condition with the local variable, because writing a local variable shouldn't affect the output of my subVI, right?
I've attached some snippets of my code... if those aren't enough to get started I can post the entire thing.  However, be warned: this is my first ever LabVIEW project and I'll freely admit that I'm in over my head and I'm still trying to learn good ways of keeping my code clean.
Thanks in advance for the help!
Attachments:
Main.png ‏39 KB
solenoid_error.png ‏79 KB

kyle8 wrote:
Bill,
Thanks for the reply.  Yes, that's exactly what I'm seeing.  My input to my subVI (Solenoid Active?) is true as it should be.  Therefore, I expect that "Extend" is high and "Retract" is low (focusing on Upper Platen Left, because that's where I saw the problem first).  This ought to give me a True output when the upper platen is extended.  However, when executed normally, my line always shows false (even though the upper platen is clearly extended).
Is it possible that I don't give the sensor enough time to settle, that LabVIEW executes that quicker than the solenoid can physically actuate / the sensor can sense?  The solenoid is actuated in the Toggle Relay subVI shown in Main, and then I run directly into checking that the sensors show proper actuation.  Again, since I know the function is working and that during highlight execution and singgle-stepping through the code I get my desired True output, I don't really see what else it could be.  Think I'm on the right track?
I think you are definitely on the right track. 
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

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    this is my code, how to store data after clicking checkbox in databasetable,
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         bwart LIKE mseg-bwart,
         budat LIKE mkpf-budat,
         menge LIKE mseg-menge,
         meins LIKE mseg-meins,
         kostl LIKE mseg-kostl,
         aufnr LIKE mseg-aufnr,
         rsnum LIKE mseg-rsnum,
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                   slgpbe FOR mard-lgpbe MODIF ID m5,
                   scharg FOR mseg-charg MODIF ID m6,
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                   saufnr FOR mseg-aufnr MODIF ID m9,
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          t_heading  TYPE slis_t_listheader.
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            w_comm    TYPE slis_formname,
            w_status  TYPE slis_formname,
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      REFRESH t_sort.
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            5 'LGPBE' 'LGPBE' 'MARD' space space space space space space space space space space space space t_fieldcat ,
            6 'CHARG' 'CHARG' 'MSEG' space space space space space space space space space space space space t_fieldcat ,
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            9 'MENGE' 'MENGE' 'MSEG' space  space space space space space space space space space space space t_fieldcat,
            10 'MEINS' 'MEINS' 'MSEG' space  space space space space space space space space space space space t_fieldcat,
            11 'KOSTL' 'KOSTL' 'MSEG' space  space space space space space space space space space space space t_fieldcat,
            12 'AUFNR' 'AUFNR' 'MSEG' space  space space space space space space space space space space space t_fieldcat,
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      wa_fieldcat-fieldname = p_fieldname.
      wa_fieldcat-col_pos = p_colpos.
      wa_fieldcat-no_out = p_noout.
      wa_fieldcat-HOTSPOT = p_hotspot.
      wa_fieldcat-CHECKBOX = p_checkbox.
      wa_fieldcat-ICON = p_showasicon.
      wa_fieldcat-do_sum = p_dosum.
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        wa_fieldcat-rollname =   p_ref_fieldname.
      ELSE.
        wa_fieldcat-ref_tabname = p_ref_tabname.
        IF p_ref_fieldname EQ space.
          wa_fieldcat-ref_fieldname =   wa_fieldcat-fieldname.
        ELSE.
          wa_fieldcat-ref_fieldname =   p_ref_fieldname.
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      IF NOT p_outputlen IS INITIAL.
        wa_fieldcat-outputlen = p_outputlen.
      ENDIF.
    Set text headers.
      IF NOT p_seltext_m IS INITIAL.
        wa_fieldcat-seltext_m = p_seltext_m.
      ENDIF.
      IF NOT p_seltext_l IS INITIAL.
        wa_fieldcat-seltext_l = p_seltext_l.
      ENDIF.
      IF NOT p_seltext_s IS INITIAL.
        wa_fieldcat-seltext_s = p_seltext_s.
      ENDIF.
      IF NOT p_reptext_ddic IS INITIAL.
        wa_fieldcat-reptext_ddic = p_reptext_ddic.
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      IF NOT p_ddictxt IS INITIAL.
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      IF p_edit IS NOT INITIAL.
        wa_fieldcat-INPUT     = 'X'.
        wa_fieldcat-EDIT     = 'X'.
      ENDIF.
      APPEND wa_fieldcat TO t_fieldcat.
    ENDFORM.                   "set_fieldcat2
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    FORM top_of_page.
      CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'
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        it_list_commentary = t_heading.
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         Set your "double click action" response here.
         Example code: Create and display a status message.
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               w_row(4) TYPE n.
         w_row = rs_selfield-tabindex.
         CONCATENATE 'You have clicked row' w_row
                     'field' rs_s lfield-fieldname
                     'with value' rs_selfield-value
                     INTO w_msg SEPARATED BY space.
         MESSAGE w_msg TYPE 'S'.
    ENDCASE.
    End of example code.
    ENDFORM.                    "user_command
    this is mycode,mblnr, matnr and checkbox both field had created in database table
    then save data after clicking checkbox data stored in database table,and next clickin checkboxes are no change. this my requirment.
    plz send me code .

    Try this
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    Hi
    You can use TDMS file format to save the data. I have attached a reference Vi.
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    Thanks and Regards
    Himanshu Goyal
    Thanks and Regards
    Himanshu Goyal | LabVIEW Engineer- Power System Automation
    Values that steer us ahead: Passion | Innovation | Ambition | Diligence | Teamwork
    It Only gets BETTER!!!
    Attachments:
    Data Save in File.vi ‏35 KB

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