Intermittent Error

[Jeff Barnes]

Hi,

I have a routine that will check to see if MS-Excel is running and if so, terminate it.

It works about 95% of the time but I get an intermittent error pop up every now and then.

Here is the code I use:

Code: Select all  Expand view  RUN

FUNCTION WMIService()
   static oWMI
   local oLoc
   if oWMI == nil
      oLoc  := CREATEOBJECT( "wbemScripting.SwbemLocator" )
      oWMI  := oLoc:ConnectServer()
   endif
return oWMI

FUNCTION KillExcel()
   local oWmi, oList, oProc
   IF UPPER(ALLTRIM( cWinVersion() )) = "VISTA"
      Return Nil
   ENDIF
   Syswait(.01)
   oWmi     := WmiService()
   oList    := oWmi:ExecQuery( "select * from Win32_Process" )
   for each oProc in oList
         if oProc:Name = "EXCEL.EXE"
            oProc:Terminate()
            Syswait(1)
         endif
   next
return nil
 

The error that pops up is:

Error description: Error wbemScripting.SwbemLocator/16389 E_FAIL: CONNECTSERVER
Args:

Stack Calls
===========
Called from: win32ole.prg => TOLEAUTO:CONNECTSERVER(0)
Called from: EzSat.prg => WMISERVICE(20820)
Called from: EzSat.prg => KILLEXCEL(20831)

Anyone have any ideas as to why I get this error?

[StefanHaupt]

Jeff,

you can use TRY..CATCH to avoid the error message

Code: Select all  Expand view  RUN

TRY
    oLoc := CreateObject( "wbemScripting.SwbemLocator" )
  CATCH oErr
    TRY
       oLoc := CreateObject( "wbemScripting.SwbemLocator" )
    CATCH oErr
        oLoc := nil
    END
END
 

[Daniel Garcia-Gil]

Jeff

what do you use, Harbour, xHarbour?

[Jeff Barnes]

Thanks Stefan, I will try your idea to see if it helps

Daniel, I use xHarbour.

[Daniel Garcia-Gil]

try

Code: Select all  Expand view  RUN

#include "fivewin.ch"

function Main

   LOCAL oWnd, oTimer
   
   define window oWnd
   
   define timer oTimer interval 5000 action VerifyExcel( oTimer, oWnd ) of oWnd
   
   activate window oWnd on init oTimer:activate()


return nil

function VerifyExcel( oTimer, oWnd )
   
   local oExcel, oError

   TRY
      oExcel   = GetActiveObject( "Excel.Application" )
      oExcel:Quit()
   CATCH oError
   END  
   
return nil  
 

[Jeff Barnes]

Thanks Daniel,

This works if only one instance of Excel is open but what if there are more than one?

[Daniel Garcia-Gil]

Jeff

Code: Select all  Expand view  RUN

#include "fivewin.ch"

function Main

   LOCAL oWnd, oTimer
   
   define window oWnd
   
   define timer oTimer interval 100 action VerifyExcel( oTimer, oWnd ) of oWnd
   
   activate window oWnd on init oTimer:activate()


return nil

function VerifyExcel( oTimer, oWnd )
   
   local oExcel, oError,  lExit := .F.
   
   TRY
      oExcel   = GetActiveObject( "Excel.Application" )
      oExcel:Quit()
      oWnd:cTitle = time()
      Sleep( 1000 )
   CATCH oError
   END  
   
return nil