LabVIEW 7.1 reports an application error 'instruction adresses memory at 0x00000000 - ... could not be written' when finishing LabVIEW, even when not running any private code

Hi there,
I have found similar Qs here, but this one is _somehow_ different.
My quite large app (>600 VIs) uses some DLL calls to communicate with medical devices. It runs OK, AFAIK, even when started several times. BUT I get an error message each time I when finishing LabVIEW 7.1 (even when just having loaded the app!!!). The error message states that "The instruction at 0x778cca36 adresses memory at 0x00000000. The process 'written' could not be done on that memory. Click to close the app".
Any clues?
My system: Athlon64 3000+ with 1GB of RAM running W2k German with all availabel SPs, LabVIEW 7.1 English with all support files from the devellopr suite May05 edition. System was set up 2 days ago on a fresh PC. The old system showed the very same behavior.
My opinion is, that simply loading an app and than removing it should not cause such an error??!!
Greetings from Germany!
Uwe
Attachments:
Application_Error_LabVIEW_when_finishing.jpg ‏20 KB

I can't look at your code because I don't have LV 7.1, but I would recommend searching on the side of the DLL.
Do you have the source for the DLL? Can you be sure that the DLL doesn't somehow have a memory addressing bug? The DLL will be loadsd as soon as the program is loaded AFAIK, so maybe when unloading the DLL an error occurs because something isn't initialised properly. I've never programmed a DLL, so I may be way wrong, but my instinct tells me that the problem will most likely be with the DLL.
Hope this helps
Shane.
Using LV 6.1 and 8.2.1 on W2k (SP4) and WXP (SP2)

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Hi all,
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Hello Olaf,
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Input buffer overrun;"
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Attachments:
labview_error.JPG ‏107 KB
labview_block_diagram.JPG ‏76 KB

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LB_Setup_Error.gif ‏36 KB

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If I have a small timeout, say 100ms, and perform a save operation and op complete query on the device (*SAV 1;OPC?), then do up to 10 VISA reads; the first few reads time out (as expected), but then I frequently get the following error:
-1073807305 (0xBFFF0037) VI_ERROR_INP_PROT_VIOL. "Device reported an input protocol error during transfer."
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Attachments:
VISA problems.zip ‏38 KB

I thought I would try to duplicate your problems, but I only have a Tektronix TDS Scope that has USB.
I am a big fan of using *OCP? to sync instruments control and your problem is of interest to me
This very simple write/read returns the *OPC '1' return char consistently between 175-185 ms. No problem
Trying your short timeout with a loop, I do not get what I or you expected.
If I run this with an adequate timeout (something well longer than the needed 185 ms) it returns in between 175-185 ms with one time through the for loop. As expected. No problem.
BUT! If I try setting the timeout to something below the needed 175 ms like your 100ms...
Sometimes it works but it takes over 2000 ms to return but only goes though the for loop twice.
But sometime it does not work at all, taking well over 10 sec to exit out of the for loop with a timeout error.
I never see the queue error that you are seeing
How long does it take to do a simple *SAV
I don’t think the queue error is coming from the instrument. You would have to send the instruments the SYSTEM:ERROR? Request before the instrument would report any of the instruments errors.
Be sure to set your Termination Char setting. I prefer to turn it off for the Writes so I control when to send it. But turn it on for the Reads
Also I noticed from your trace files that you use the *OPC? after a *IDN?. This is not needed as you will know the *IDN? is complete when your received the string back. In fact my Tektronix scope did not like it if I sent it "*IDN?;*OPC?\n". It would not send me anything back, not even the IDN.
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Row Selector Checkbox in Report throws "wwv_flow.accept" Error when checked

Hello all,
I ran into some time consuming trouble on
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Edited by: F Lan on 27.09.2012 13:18
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Performance issue in Report (getting time out error)

Hi experts,
I am doing Performance for a Report (getting time out error)
Please see the code below and .
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SELECT MAX( ERDAT ) .
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Advance thanks
from
Nagendra
Get Sales Order Details
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SELECT VBELN POSNR MATNR NETWR KWMENG WERKS FROM VBAP
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     FOR ALL ENTRIES IN IVBAK
       WHERE VBELN = IVBAK-VBELN
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       AND   ABGRU = ' '.
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CLEAR: WK_MATNR, WK_WERKS, WK_PRDHA, WK_MAKTX,
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      CLEAR WK_INVDATE.                                   "I6677.sn
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      AUBEL EQ IVBAP-VBELN AND
      AUPOS EQ IVBAP-POSNR.
      IF SY-SUBRC = 0.
          MOVE WK_INVDATE TO IVBAP-INVDT.
          MODIFY IVBAP.
      ENDIF.                                               "I6677.e n
      SELECT SINGLE * FROM MBEW WHERE             "I6759.sn
      MATNR EQ IVBAP-MATNR AND
      BWKEY EQ IVBAP-WERKS AND
      BWTAR EQ SPACE.
      IF SY-SUBRC = 0.
         MOVE MBEW-STPRS TO IVBAP-STPRS.
         IVBAP-TOT = MBEW-STPRS * IVBAP-KWMENG.
         MODIFY IVBAP.
      ENDIF.                                      "I6759.en
    IF IVBAP-MATNR NE WK_MATNR OR IVBAP-WERKS NE WK_WERKS.
      CLEAR: WK_BLOCK, WK_MMSTA, WK_MSTAE, WK_PRDHA, WK_MAKTX.
      MOVE IVBAP-MATNR TO WK_MATNR.
      MOVE IVBAP-WERKS TO WK_WERKS.
      SELECT SINGLE MMSTA FROM MARC INTO MARC-MMSTA
        WHERE MATNR = WK_MATNR
        AND   WERKS = WK_WERKS.
      IF NOT MARC-MMSTA IS INITIAL.
        MOVE '*' TO WK_MMSTA.
      ENDIF.
      SELECT SINGLE LVORM PRDHA MSTAE MSTAV FROM MARA
        INTO (MARA-LVORM, MARA-PRDHA, MARA-MSTAE, MARA-MSTAV)
        WHERE MATNR = WK_MATNR.
      IF ( NOT MARA-MSTAE IS INITIAL ) OR
         ( NOT MARA-MSTAV IS INITIAL ) OR
         ( NOT MARA-LVORM IS INITIAL ).
         MOVE '*' TO WK_MSTAE.
      ENDIF.
      MOVE MARA-PRDHA TO WK_PRDHA.
      SELECT SINGLE MAKTX FROM MAKT INTO WK_MAKTX
        WHERE MATNR = WK_MATNR
          AND SPRAS = SY-LANGU.
    ENDIF.
    IF Z_BLOCK EQ 'B'.
      IF WK_MMSTA EQ ' ' AND WK_MSTAE EQ ' '.
        DELETE IVBAP.
        CONTINUE.
      ENDIF.
    ELSEIF Z_BLOCK EQ 'U'.
      IF WK_MMSTA EQ '' OR WK_MSTAE EQ ''.
        DELETE IVBAP.
        CONTINUE.
      ENDIF.
    ELSE.
      IF WK_MMSTA EQ '' OR WK_MSTAE EQ ''.
        MOVE '*' TO WK_BLOCK.
      ENDIF.
    ENDIF.
    IF WK_PRDHA IN Z_PRDHA.                                    "I4792
      MOVE WK_BLOCK TO IVBAP-BLOCK.
      MOVE WK_PRDHA TO IVBAP-PRDHA.
      MOVE WK_MAKTX TO IVBAP-MAKTX.
      MODIFY IVBAP.
    ELSE.                                                     "I4792
      DELETE IVBAP.                                           "I4792
    ENDIF.                                                    "I4792
    IF NOT Z_ALNUM[] IS INITIAL.                              "I9076
      SELECT SINGLE * FROM MAEX                               "I9076
        WHERE MATNR = IVBAP-MATNR                             "I9076
          AND ALNUM IN Z_ALNUM.                               "I9076
      IF SY-SUBRC <> 0.                                       "I9076
        DELETE IVBAP.                                         "I9076
      ENDIF.                                                  "I9076
    ENDIF.                                                    "I9076
ENDLOOP.

Hi Nagendra!
Get Sales Order Details
CLEAR IVBAP.
REFRESH IVBAP.
check ivbak is not initial
SELECT VBELN POSNR MATNR NETWR KWMENG WERKS FROM VBAP
INTO CORRESPONDING FIELDS OF TABLE IVBAP
FOR ALL ENTRIES IN IVBAK
WHERE VBELN = IVBAK-VBELN
AND MATNR IN Z_MATNR
AND WERKS IN Z_WERKS
AND ABGRU = ' '.
Check for Obsolete Materials - Get Product Hierarhy/Mat'l Description
SORT IVBAP BY MATNR WERKS.
CLEAR: WK_MATNR, WK_WERKS, WK_PRDHA, WK_MAKTX,
WK_BLOCK, WK_MMSTA, WK_MSTAE.
avoid select widin loop. instead do selection outside loop.u can use read statement......and then loop if required.
LOOP AT IVBAP.
CLEAR WK_INVDATE. "I6677.sn
SELECT MAX( ERDAT ) FROM VBRP INTO WK_INVDATE WHERE
AUBEL EQ IVBAP-VBELN AND
AUPOS EQ IVBAP-POSNR.
IF SY-SUBRC = 0.
MOVE WK_INVDATE TO IVBAP-INVDT.
MODIFY IVBAP.
ENDIF. "I6677.e n
SELECT SINGLE * FROM MBEW WHERE "I6759.sn
MATNR EQ IVBAP-MATNR AND
BWKEY EQ IVBAP-WERKS AND
BWTAR EQ SPACE.
IF SY-SUBRC = 0.
MOVE MBEW-STPRS TO IVBAP-STPRS.
IVBAP-TOT = MBEW-STPRS * IVBAP-KWMENG.
MODIFY IVBAP.
ENDIF. "I6759.en
IF IVBAP-MATNR NE WK_MATNR OR IVBAP-WERKS NE WK_WERKS.
CLEAR: WK_BLOCK, WK_MMSTA, WK_MSTAE, WK_PRDHA, WK_MAKTX.
MOVE IVBAP-MATNR TO WK_MATNR.
MOVE IVBAP-WERKS TO WK_WERKS.
SELECT SINGLE MMSTA FROM MARC INTO MARC-MMSTA
WHERE MATNR = WK_MATNR
AND WERKS = WK_WERKS.
IF NOT MARC-MMSTA IS INITIAL.
MOVE '*' TO WK_MMSTA.
ENDIF.
SELECT SINGLE LVORM PRDHA MSTAE MSTAV FROM MARA
INTO (MARA-LVORM, MARA-PRDHA, MARA-MSTAE, MARA-MSTAV)
WHERE MATNR = WK_MATNR.
IF ( NOT MARA-MSTAE IS INITIAL ) OR
( NOT MARA-MSTAV IS INITIAL ) OR
( NOT MARA-LVORM IS INITIAL ).
MOVE '*' TO WK_MSTAE.
ENDIF.
MOVE MARA-PRDHA TO WK_PRDHA.
SELECT SINGLE MAKTX FROM MAKT INTO WK_MAKTX
WHERE MATNR = WK_MATNR
AND SPRAS = SY-LANGU.
ENDIF.
IF Z_BLOCK EQ 'B'.
IF WK_MMSTA EQ ' ' AND WK_MSTAE EQ ' '.
DELETE IVBAP.
CONTINUE.
ENDIF.
ELSEIF Z_BLOCK EQ 'U'.
IF WK_MMSTA EQ '' OR WK_MSTAE EQ ''.
DELETE IVBAP.
CONTINUE.
ENDIF.
ELSE.
IF WK_MMSTA EQ '' OR WK_MSTAE EQ ''.
MOVE '*' TO WK_BLOCK.
ENDIF.
ENDIF.
IF WK_PRDHA IN Z_PRDHA. "I4792
MOVE WK_BLOCK TO IVBAP-BLOCK.
MOVE WK_PRDHA TO IVBAP-PRDHA.
MOVE WK_MAKTX TO IVBAP-MAKTX.
MODIFY IVBAP.
ELSE. "I4792
DELETE IVBAP. "I4792
ENDIF. "I4792
IF NOT Z_ALNUM[] IS INITIAL. "I9076
SELECT SINGLE * FROM MAEX "I9076
WHERE MATNR = IVBAP-MATNR "I9076
AND ALNUM IN Z_ALNUM. "I9076
IF SY-SUBRC 0. "I9076
DELETE IVBAP. "I9076
ENDIF. "I9076
ENDIF. "I9076
endloop.
U have used many select queries widin loop-endloop which is a big hindrance as far as performance is concerned.Avoid such practice.
Thanks
Deepika

LabVIEW 7.1 reports an applicatio​n error 'instructi​on adresses memory at 0x00000000 - ... could not be written' when finishing LabVIEW, even when not running any private code

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LabVIEW 7.1 reports an application error 'instruction adresses memory at 0x00000000 - ... could not be written' when finishing LabVIEW, even when not running any private code