Hi there all.
I have a problem with SerialPort that can't seem to find a solution for
a couple of days now.

I use the SerialPort to send AT commands to a modem.
Simple AT commands like ATE1, ATQ0 etc. and simple call.
Open the port, Send the AT command, read the response, close the port.
When I use SerialPort in an OnClick event of a button in a form
everything works fine.
When I use SerialPort from inside a thread in single processor system
everything still works fine.

When I use SerialPort from a thread in a 4 cpu server, sending to the
port seems to work fine, but no data ever come from it. The BytesInRead
property is always zero, and the DataReceived event never fires.
The same thing on the same server, works fine if called from a OnClick
event of a button in a form. That is when called from the application's
main thread.

Does anyone has any ideas?
Thank you all in advance
George

Hi,

I think you need to report this as a possible bug on:
http://msdn.microsoft.com/vstudio/support/.

I do not have a multiple processor system, so I cannot confirm it.  Sorry.

Dick

Dick Grier wrote:

Thanks for your time Dick,

It was actually a thread serialization problem since in 4 cpu systems
things really go parallel.

George

OK, thanks for reporting back.

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