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Topic: Windows exeption (Read 5804 times)

Grueni
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Windows exeption
on: May 23^rd, 2011, 2:49am

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Hello all,
I need your help.
we use the control to communicate with a measuring device.
It sends 10 ASCII for a single measurment. We measure 4000 times / sec.
All goes well for a couple of hours.
But some times we get a windows exeption:

in this code section:

Private Sub CHRControl_OnReceive(ByVal Sender As Object, _
� � � �ByVal NumberOfBytesInBuffer As System.UInt32) _
� � � �Handles CHRControl.OnReceive
� � � �'----------------------------------------------------------------
� � � �Dim BytesInBuffer(CInt(NumberOfBytesInBuffer - 1)) As Byte
� � � �Dim ActualNumberOfBytesInBuffer As Integer = 0
� � � �Try
� � � � � �ActualNumberOfBytesInBuffer = _
� � � � � �CInt(CHRControl.ReadArray(BytesInBuffer))
� � � � � �If ActualNumberOfBytesInBuffer > 0 Then
� � � � � � � �'---------------------------------------------------------
� � � � � � � �CHRBuffer.Append(Encoding.ASCII.GetString(BytesInBuffer))
� � � � � � � �'---------------------------------------------------------
� � � � � �End If
� � � �Catch ex As FabulaTech.SPC.FTSPCException
� � � � � �
� � � �End Try
End Sub

We are using Windows 7 prof. 32Bit
Fabula control 2.0
Visual Studio 2011
VB.net

The exception says overflow of "NumberOfBytesInBuffer"= 4294966994

Overflow Exception arithmetric operation resulted in an overflow

Do you have any advice?

Thanks
Rainer

Last Edit: May 23^rd, 2011, 3:43am by Grueni

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Harry_Mitkov
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Re: Windows exeption
Reply #1 on: May 23^rd, 2011, 3:25am

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Dear Grueni,

Please try using the latest version of Serial Port Control 2.2
http://www.fabulatech.com/serial-port-control.msi
If your problem happens again with 2,2 version then please contact me at support@fabulatech.com

Thanks

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Grueni
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Re: Windows exeption
Reply #2 on: May 24^th, 2011, 1:14am

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Dear Harry

I'm now in big trouble
after I reinstalled our version 2.16

and try to start my application I always get:

FTSPC Eception
FTSPC Access is denied

What did I wrong?

Thanks
Rainer

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Harry_Mitkov
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Re: Windows exeption
Reply #3 on: May 24^th, 2011, 1:48am

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Dear Grueni,

Have you tried version 2.2 from our website?
http://www.fabulatech.com/serial-port-control.msi

Please try it. If issue will happen again with version 2.2 then please send me
the code of your application to support@fabulatech.com so our developer can analyse it.
(The complete source code of your application is not necessary. That would be great to if you can give us a separate part of code that reproduces the issue)

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Grueni
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Re: Windows exeption
Reply #4 on: May 25^th, 2011, 1:09am

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Dear Harry,

it did not help.
I got the same error as before.

I sent email to your support division

Thanks for your help

Rainer

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