[ncl-install] errors in NCL-test

[Kevin Hallock]

Hi Lixu,

I believe that error message occurs if the $DISPLAY environment variable is not set or if there is no X11 display server available.

Could you please try running the command “echo $DISPLAY”?

Which OS are you running? If you are on a Mac, you may need to install XQuartz.

Are you trying to run NCL on a remote server that you connected to using SSH? If so, you will need to pass the “-Y” flag to your ssh command to allow the remote server to interact with your local X11 display server.

Also, if you do not need to display output to an X11 window (i.e. you’re not creating any graphics at all or you’re generating PNG/JPG/etc files as output), then other NCL scripts might run without needing to worry about this issue. For example, you can try running “ng4ex xy04n -clean -W png” to have the same test script generate a PNG file (named “xy04n.png”) instead of NCL trying to display to an X11 window.

I hope this helps,
Kevin

> On Aug 12, 2018, at 7:08 PM, ? ?? via ncl-install <ncl-install at ucar.edu> wrote:
> 
> Dear Sir/Madam
> I have successfully install the NCL. However, when I test it, I met some probelms.
> If you could  give me some instruction in how to solve the following errors given blow, it would be great.
>                                                                                                                                         
>                                                                                                                                      Regards
>                                                                                                                                      Lixu Jin
> fatal:Workstation with PID#8 is not open
> fatal:Unable to open Workstation-Can't Create
> fatal:Unable to access object with id:-4
> fatal:_NhlCreate:Invalid Parent id #-4
> fatal:NhlDraw: Invalid Layer Id: -4
> fatal:Unable to update Workstation with PID#-4
> fatal:Unable to clear Workstation with PID#-4
> fatal:["Execute.c":8637]:Execute: Error occurred at or near line 158 in file xy04n.ncl
>  
>  
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