Matlab Server as a DDE Server

[cmd...@my-deja.com]

Has anyone tried using Matlab Server as a server for a DDE
conversation? I'm using a VB program to be the client, here is the
code:

txtMatlabCommand.LinkMode = vbLinkNone
txtMatlabCommand.LinkTopic = "MATLAB|Engine"
txtMatlabCommand.LinkItem = "EngEvalString"
txtMatlabCommand.LinkMode = vbLinkManual
txtMatlabCommand.LinkExecute Command

where txtMatlabCommand is a text control on my form, and Command is a
string (in many cases it is something as simple as "x=5"). The problem
I have is that I will receive the following error:

Timeout while waiting for DDE response (Error 286)

Is it possible to start a DDE conversation with the Matlab Server? Any
help would be appreciated.

Curtis Ditz
Alliant Techsystems

Sent via Deja.com
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[Hecker]

I failed to mention:

Text1.LinkTimeout=5 'default

Also, you need to have Matlab running during your test.

-Chris

Hecker wrote:

> Curtis,
>
> This works for me:
>
> Private Sub Command1_Click()
> Static i ' Worksheet row number.
> i = i + 1 ' Increment Row.
> If i = 1 Then ' First time only.
> ' Make sure the link isn't active.
> Text1.LinkMode = 0
> ' Set the application name and topic name.
> Text1.LinkTopic = "Matlab|Engine"
> Text1.LinkItem = "EngEvalString" ' Set LinkItem.
> Text1.LinkMode = 2 ' Set LinkMode to Automatic.
> Text1.LinkExecute "x=1"
> Else
> Text1.LinkExecute "x=" & i
> End If
> End Sub
>
> Maybe in a loop you're killing the link?
>
> Using R12 and VB6SP3
>
> -Chris

[Hecker]

Curtis,

This works for me:

Private Sub Command1_Click()
Static i ' Worksheet row number.
i = i + 1 ' Increment Row.
If i = 1 Then ' First time only.
' Make sure the link isn't active.
Text1.LinkMode = 0
' Set the application name and topic name.
Text1.LinkTopic = "Matlab|Engine"
Text1.LinkItem = "EngEvalString" ' Set LinkItem.
Text1.LinkMode = 2 ' Set LinkMode to Automatic.
Text1.LinkExecute "x=1"
Else
Text1.LinkExecute "x=" & i
End If
End Sub

Maybe in a loop you're killing the link?

Using R12 and VB6SP3

-Chris

[cmd...@my-deja.com]

Chris,

Thanks for your response, and solution. The problem was that
I was not clear with my original message. I'm able to use the
DDE conversation with the original code that I posted. That
code, like yours, works well with Matlab running. The problem
that I'm having is setting up a conversation with the Matlab
Runtime Server.

I had contacted Mathworks and asked them if this could be done.
They responded stating they didn't see any reason why the runtime
server wouldn't work the same way. However, I haven't been able
to successfully get the code to work. I receive the timeout error
that I mentioned earlier.

If you have any insight on the runtime server I would appreciate
any thoughts.

Thanks again,

[Hecker]

Oops, my fault. Still, it was a good exercise for me!

Good luck.

-Chris

[Dean Redelinghuys]

[This followup was posted to comp.soft-sys.matlab and a copy was sent to
the cited author.]

Hi Curtis,

This is a shot in the dark, but it might be a reason why this is not
working.

Assumptions:
- On your development machine (that has a professional non-RunTime Server
MATLAB installed), the code runs fine.
- On a machine with just a Runtime versino of MATLAB installed (i.e., you
access it only with your application) it is timing out.

The possibility here is that the Runtime Server hasn't (yet) been registered
as an ActiveX Automation Server. You would need to run
matlab.exe /automation

just once on the machines you're installing to. THis sets up the application
as an ActiveX Autoamtion Server (and hence a DDE server).

Let me know if this works.

Regards
Dean

<cmd...@my-deja.com> wrote in message news:91baf8$cap$1...@nnrp1.deja.com...

[cmd...@my-deja.com]

Hey Dean,

Thanks for the reply. I have a Matlab version running on my PC, and
I'm attempting to run Matlab Runtime Server on the same PC as well.
I don't know if this helps or hurts.

Anyway, when I run my regular Matlab with my DDE code it works fine.
So I tried your suggestion with the Matlab Runtime Server and the
"Automation" switch, and I have been getting the same thing. I have
also tested some other code that starts ActiveX to Matlab, and this
works correctly. It's just that the Runtime Server does not seem
to be responding. I'm going to try your suggestion on a clean machine
and I'll let you know how it goes.

Thanks for your help.

Curtis Ditz
Alliant Techsystems

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