Using Atmel 7 with a clone Uno I receive the following error when I build and upload an otherwise working ino with {@Plot.MyPlotWindow.Sensor.temperature}, where temperature is my variable:

Compiling debug version of 'bmp' for 'Arduino/Genuino Uno'
 
bmp.ino: 59:150: error: stray '@' in program
   Serial.println(" C");
    debugger: The error shown above might be caused by invalid breakpoint syntax or the board is not yet supported for debugging (pls let us know!)
 
bmp.ino: In function void loop()
 
bmp.ino: 59:151: error: 'Plot' was not declared in this scope
   Serial.println(" C");
    debugger: The error shown above might be caused by invalid breakpoint syntax or the board is not yet supported for debugging (pls let us know!)
Error compiling project sources
Debug build failed for project 'bmp'

Hi,
As I wrote in the mail the line I entered was in curly braces viz {@Plot.MyPlotWindow.Sensor.temperature}. I am just trying to get the plot function working using your example and just substituing the variable.
Best

Many thanks, it is working now with the introduction of the space.
Best

Also when I chart some variable I obtain 2 copies of each graph and they do not close down when I build and upload changes or for that matter when I change projects albeit another project using a different com port.

A screen shot of the ide
Attached
How many projects open in the current solution
One project open
What breakpoint syntax you have added to the project(s).
The syntax is {@Plot.Temperature event.pressure}{@Plot.MySensors.Temperature2 temperature} shown on the Expressions screen. I just copied what you sent to get it working which as I reported it does.
Confirm if you close serial the plot windows close for that port?
Yes they are closed. I can understand that the ports has to be shut before rebuilding but as I wrote I seem to get two copies of the graphs even after closing.
Have you been debugging one project at a time or multiple
One at a time
Is the port changing in the same project or in different projects?
My mistake different (clone) board uses different comm port
Which Visual Studio IDE version?
I am using Atmel Studio 7.
Can the Pressure y axis be scaled to fit so to speak?
Thank you Tim

Umm, I did as you said I believe and get an error screen which I originally saw only once on my first build prior to this exchange but now it is persistant.

Okay there is a zedgraph.dll in the [visual micro\Micro Extensions\Debugger Visualizations\AnalogGraphExample\bin folder

Copy it to Micro Extensions\Debugger Visualizations\MultiPlot\bin then restart and it will work.

Looks like @plot hasn't been tested in as7 recently!

If you are using the trial it's okay, it the same as a registered version. 

Let's ignore that and understand what problem you are having with the plot window?

If the problem that it does not appear? If so please confirm if the trace point associated to the @plot is being displayed in the trace window during debug?

If the trace point is displayed then the debug is working it is just the plot window that is not being displayed. In this case click the settings icon on the serial monitor (located to the right of the email/send button)

On the settings button a menu is shown. Lower down the list is "Running Visualizations". If you can see the name of the @plot in the running visualizations list then untick (uncheck) it and then re-tick it again.

If this does not resolve issue then please give feed back on each of the above points in this post.

Thanks