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From: mattd1 on 11 Feb 2010 09:49
Hi all -

Is anyone using the IO.Ports.SerialPort object successfully under Windows 7
64 bit? My PC crashed and in the rebuild I moved to 64 bit Win7, and now an
app I had running successfully for quite a while (probably a year) on 32 bit
Vista now does not work on Win7 64 bit. I get various random errors, like
stack overflows in mscorlib, uninitialized objects, all in mscorlib. Twice
while debugging I stepped through some comm code, and it actually blue
screened Win7 with a page fault. I have other apps that do not use the
serial port, and they work fine on 64 bit, it seems the serial port object
has some serious problems in 64 bit. Can anyone confirm this? Or tell me
what magic trick needs to be performed to get it to work right?

Thanks

Matt


From: Family Tree Mike on 11 Feb 2010 10:35
On 2/11/2010 9:49 AM, mattd1 wrote:
> Hi all -
>
> Is anyone using the IO.Ports.SerialPort object successfully under Windows 7
> 64 bit? My PC crashed and in the rebuild I moved to 64 bit Win7, and now an
> app I had running successfully for quite a while (probably a year) on 32 bit
> Vista now does not work on Win7 64 bit. I get various random errors, like
> stack overflows in mscorlib, uninitialized objects, all in mscorlib. Twice
> while debugging I stepped through some comm code, and it actually blue
> screened Win7 with a page fault. I have other apps that do not use the
> serial port, and they work fine on 64 bit, it seems the serial port object
> has some serious problems in 64 bit. Can anyone confirm this? Or tell me
> what magic trick needs to be performed to get it to work right?
>
> Thanks
>
> Matt
>
>

I don't have particular knowledge about the SerialPort class. Whenever
this type of scenario would occur in other codes moved to 64 bits, I
would rebuild the application targeting 32 bits (x86) and try the
application in that mode. The "Any CPU" mode seems to provide a false
sense of security in some respects.

--
Mike
From: mattd1 on 11 Feb 2010 10:46
I did try that, and it just gave me different errors. I may wind up using XP
mode to see if that can get around the problem. I thought I would be safe
using the built in serial port classes. Guess I was wrong.

Thanks for the reply though

Matt

"Family Tree Mike" <FamilyTreeMike(a)ThisOldHouse.com> wrote in message
news:e5mUe$yqKHA.4752(a)TK2MSFTNGP04.phx.gbl...
> On 2/11/2010 9:49 AM, mattd1 wrote:
>> Hi all -
>>
>> Is anyone using the IO.Ports.SerialPort object successfully under Windows
>> 7
>> 64 bit? My PC crashed and in the rebuild I moved to 64 bit Win7, and now
>> an
>> app I had running successfully for quite a while (probably a year) on 32
>> bit
>> Vista now does not work on Win7 64 bit. I get various random errors, like
>> stack overflows in mscorlib, uninitialized objects, all in mscorlib.
>> Twice
>> while debugging I stepped through some comm code, and it actually blue
>> screened Win7 with a page fault. I have other apps that do not use the
>> serial port, and they work fine on 64 bit, it seems the serial port
>> object
>> has some serious problems in 64 bit. Can anyone confirm this? Or tell me
>> what magic trick needs to be performed to get it to work right?
>>
>> Thanks
>>
>> Matt
>>
>>
>
> I don't have particular knowledge about the SerialPort class. Whenever
> this type of scenario would occur in other codes moved to 64 bits, I would
> rebuild the application targeting 32 bits (x86) and try the application in
> that mode. The "Any CPU" mode seems to provide a false sense of security
> in some respects.
>
> --
> Mike


From: Jani J�rvinen [MVP] on 14 Feb 2010 05:47
Hello Matt,

> Is anyone using the IO.Ports.SerialPort object successfully under Windows
> 7 64 bit? My PC crashed and in the rebuild I moved to 64 bit Win7, and now
> an app I had running successfully for quite a while (probably a year) on
> 32 bit Vista now does not work on Win7 64 bit.

In addition to what others have already said, I'd like to ask more details
about the device/hardware you are trying to communicate with on Windows 7
64-bit. Can you share more details about it?

Technically, you should be able to use the SerialPort class the same n
32-bit and 64-bit installations, but could it be that the device itself
doesn't like 64-bit Windows 7? That is, do you need to install any drivers
for the device? If yes, then it *might* be the problem, and not the code
you've written. If the serial port a virtual/software serial port by chance?

Thanks!

--
Regards,

Jani J�rvinen
C# MVP
Vantaa, Finland
E-mail: janij(a)removethis.dystopia.fi
Business: http://www.nimacon.net/
Personal: http://www.saunalahti.fi/janij/


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