Index was outside the bounds of the array.

Question

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I have this little program:

VB

Private Sub ButtonDecharger_Click(ByVal sender As System.Object, ByVal e As
      System.Windows.RoutedEventArgs) Handles ButtonDecharger.Click


      SpyModemem.GetItem(BytesNumber, ComportNumber, cualmodem)

      TextBox1.Text = cualmodem
End Sub

When i do "click" in the "ButtonDecharger", i get the next problem:

"An unhandled exception of type 'System.IndexOutOfRangeException' occurred in JriSpCore.dll"

"Additional information: L'index se trouve en dehors des limites du tableau".

What kind of error is that one. I don't have any array.

Somebody can help me please?

Thanks

Posted 31-Jul-13 4:35am

alonetmr

Updated 31-Jul-13 4:47am

Joezer BH

v3

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Comments

[no name] 31-Jul-13 10:41am

"What kind of error is that one"... "L'index se trouve en dehors des limites du tableau", it's French...
It does not have to be your array.

Sergey Alexandrovich Kryukov 31-Jul-13 10:51am

5! :-)
(OP needs to learn French, is that what you say? :-)
—SA

alonetmr 31-Jul-13 10:49am

hi, sorry, is french. the traduction is:

Index was outside the bounds of the array

Sergey Alexandrovich Kryukov 31-Jul-13 10:52am

Are you sure it's an array, nothing else. Likewise, it could be any collection with indexing. In all cases, the methods of investigation and fixing of the problems are very similar...
—SA

alonetmr 31-Jul-13 10:55am

ok, so if is not an array,what could be?

Sergey Alexandrovich Kryukov 31-Jul-13 10:57am

As I say, a collection.
—SA

3 solutions

Solution 1

Well, you have no array, but it looks the library you are using has one. You should check out the library documentation (or, if available, its source code).

Posted 31-Jul-13 4:42am

CPallini

Comments

Sergey Alexandrovich Kryukov 31-Jul-13 10:49am

Good point :-) A 5.
Oops! See the comment to the question by ThePhantomUpvoter. What OP though would be an array might be not...
—SA

CPallini 31-Jul-13 11:07am

Thank you, Sergey.

alonetmr 31-Jul-13 10:52am

hi,
In fact i have an Library DLL. But how i can found the array in my Library?
Thanks for you answer

Sergey Alexandrovich Kryukov 31-Jul-13 11:14am

Who told you it's an array?! OK, please see my answer. This is usually easy to do.
—SA

Solution 2

Beware that the index may start at 0 or -1 depening on the conventions of the programming language used for that Third Party Library. So check that the values of BytesNumber, ComportNumber (and perhaps also cualmodem) fall within the expected range (you may add/substract 1 from those numbers to test hypotheses).

Posted 31-Jul-13 4:48am

Bernhard Hiller

Comments

alonetmr 31-Jul-13 11:01am

Hi,
I just remove an item and got the following error:

"Argument not specified for parameter 'DeviceId' of 'Public Sub GetItem(Index As Integer, ByRef COMPortNumber As Integer, ByRef DeviceId As String)'.

So, the problem it doesn't came for the numbers of arguments. It must be three (3).

Bernhard Hiller 1-Aug-13 2:15am

NO!!! That's not what I said. Do not reduce the number of arguments! Change the VALUEs of the arguments by adding or substracting 1.

alonetmr 1-Aug-13 3:40am

HI, thank you for you answer but when you said : adding or substracting 1, what means that?
I can't understand your point.

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-07-31T05:13:00

Having some exception in the library without the source code can be a problem, but, if the library is good enough and this is not a library bug, the problem is usually easy to solve.

Do the following: catch all exception in the thread, on the stack frame on top of the problematic point (could be on the very top stack frame of the thread, which you ultimately have to do with most threads). When exception is caught, output (log, for example) the exception StackTrace:
http://msdn.microsoft.com/en-us/library/system.exception.stacktrace.aspx[^].

This is just a string. Reading the trace, you will see the stack of calls leading to the point where the exception is thrown. Very usual case is that you call something with bad parameters going outside of some valid index range. Chances to locate and fix the bug are usually high.

Good luck,

—SA

Index was outside the bounds of the array.

3 solutions

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