DDE Poke decided to stop working - LabVIEW 8.5

[MReveley]

I am using LabVIEW 8.5 to, among other things, communicate via DDE and a Brooks software package called SmartDDE with 6 Brooks 5850S mass-flow controllers. I have been able to get this communications link working, and incorporated it into my main control program. However, using the Advise function slowed down my loop too much, so I decided to set up a shared variable I/O server (using DSC). When I did this, DDE pokes started returning the following error: "Code: 14012 - DDE Poke: DMLERR_NOTPROCESSED". Even my base communications VI can no longer poke. Advise/request commands are still working, and SmartDDE appears to be functioning normally. Can anyone help?

Matt

[Hillary_C_E]

Hi Matt,

What I've found is that you may see error -14012 if the spreadsheet that you want to write to is not open. As always, you must launch Microsoft Excel prior to using DDE. You may use DDE to open a spreadsheet, but a spreadsheet must be open before you may use the DDE Poke.vi to write data to it.

I'd also recommend checking this Developer Zone on DDE with Windows. Hope this helps!

[MReveley]

I have actually read that one a few times. The problem I am having is not with MS Excel, but rather with a program from Brooks called SmartDDE. I was able to establish communications which were working for a while, but then when I tried to turn my communications over to an I/O server, Poke stopped working and now I can't seem to get it working again.

Matt

[Hillary_C_E]

Matt,

I'm not familiar with the Brooks SmartDDE program. But there is a long thread about problems and workarounds on this discussion forum. Perhaps it will prove useful.