Re: [ferret_users] problem with X-Windows

[Ansley Manke - NOAA Federal <ansley.b.manke@xxxxxxxx>]

Jorg,

One possibility is PyFerret which uses Python graphics libraries and not X.

Other than that I don't really have much to suggest. The issue you report with

> ferret -batch gifname.gif

does not have to do with Xwindows.  That is a separate path through the code which just writes graphics output to the file, and does not use the  X library at all. So I am mystified about what's happening there. Try some very simple script without any FRAME command.  Something like

> ferret -batch test.gif

   yes? go basemap

   yes? exit

Does that produce a plot?  If your script draws the plot and then perhaps does something that's triggering a new plot to be started, you could be left with a blank plot as this method saves only the last plot drawn to the gif file.

-Ansley

On Tue, Apr 25, 2017 at 9:28 AM, Kaduk, Jorg D. (Dr.) <jk61@xxxxxxxxxxxxxxx> wrote:

Hi Ansley and All,

 

I have looked a bit more into my X-display problem.

 

Yes, I use nx to connect to a remote machine. Everything was fine until they upgraded the system last December…

The nx version is the NoMachine Enterprise client 5.0.47 and the system runs the window system MATE (not Gnome any more, what we had before the upgrade).

 

 

The DISPLAY variable is set and I can start an xclock. That even works when I spawn a shell in ferret and call the xclock from that subshell.

 

Just to make sure I exported the DISPLAY variable. Does not help.

I run ferret from an xterm – thinking that maybe the MATE window is the problem – did not help.

 

My DISPLAY variable looks like this:

 

declare -x DISPLAY=":1058"

 

 

The error is:

 

X Error of failed request:  BadValue (integer parameter out of range for operation)

  Major opcode of failed request:  12 (X_ConfigureWindow)

  Value in failed request:  0x0

 

I guess. that says that the command X_ConfigureWindow got a 0x0 – so a zero – and it did not like that.

 

The man page for that says that it uses the XWindowChanges structure and that says:

“The width and height members are used to set the inside size of the window, not including the border, and must be nonzero, or a BadValue error results.”

 

I cannot understand what is wrong unless there is somehow the option to specify 0 for window size for a default and the system here does not like it.

Or somehow the DISPLAY variable is modified to a zero – maybe you take the part before the :

But surely many people would have had these problems if anything of that was the case…

 

If I run ferret in batch mode and then convert the metafile to a postscript and that to a jpeg with gs, it works. In this case all colour information is run through the metafile and gs…

 

Anybody any insights? Our system folks don’t know either…

 

THank you very much!

Kind regards

Joerg

 

 

 

 

 

 

Jörg Kaduk

Associate Professor

http://www.geog.le.ac.uk/staff/jk61/

ORCID: http://orcid.org/0000-0003-4051-3081

e: jk61@xxxxxxxx

t: +44 (0)116 252 3848

Department of Geography, University of Leicester, University Road, Leicester LE1 7RH, UK

 

           Elite Without Being Elitist

Follow us on Twitter or visit our Facebook page and the Departmental Twitter and Facebook page

 

From: owner-ferret_users@xxxxxxxx [mailto:owner-ferret_users@noaa.gov] On Behalf Of Ansley C. Manke
Sent: 10 April 2017 19:21
To: ferret_users@xxxxxxxx
Subject: Re: [ferret_users] problem with X-Windows

 

Hi Joerg,

Is your DISPLAY environment variable set?  Are you perhaps running Ferret on a machine other than your desktop machine? If so you'll need to make sure that the display forwarding is set up correctly. A test for this is whether a Unix command such as xclock works.  This issue does comes up from time to time; search for "display" in the Users List Archives for a few more discussions. 

Another option might be for you to use PyFerret.

Ansley

 

On 4/10/2017 8:37 AM, Kaduk, Jorg D. (Dr.) wrote:

Hello,

 

Sorry, I know, this is not a ferret topic, but maybe somebody came across this.

 

Ferret cannot open a window for the plot. It dies with an X Error (please see below).

 

A “ferret –batch picture.gif” produces an empty gif file.

 

A “ferret –batch” produces a metafile that I can convert to postscript, which I can look at in gv and can convert to jpeg with gs.  

 

Anybody seen anything like that before?

 

Thank you!

Best,

Joerg

 

 

[jk61@spectre11 jk61]$ ferret

        NOAA/PMEL TMAP

        FERRET v7 (opt)

        Linux 3.10.0-327.36.3.el7.x86_64 64-bit - 01/17/17

        10-Apr-17 16:27    

 

yes? use Rainfall.nc

           *** NOTE: Axis coordinates are decreasing-ordered. Reversing ordering for axis lat

           *** NOTE: Coordinates out of order or missing on axis lon at subscript 35

           *** NOTE: A dummy axis of subscripts will be used

yes?   shade PRECIP[l=1]

X Error of failed request:  BadValue (integer parameter out of range for operation)

  Major opcode of failed request:  12 (X_ConfigureWindow)

  Value in failed request:  0x0

  Serial number of failed request:  52

  Current serial number in output stream:  53

 

[jk61@spectre11 jk61]$ ls -al R*

-rwx------ 1 jk61 nobody 3053516 Nov 13  2013 Rainfall.nc

 

 

Jörg Kaduk

Associate Professor

http://www.geog.le.ac.uk/staff/jk61/

ORCID: http://orcid.org/0000-0003-4051-3081

e: jk61@xxxxxxxx

t: +44 (0)116 252 3848

Department of Geography, University of Leicester, University Road, Leicester LE1 7RH, UK

 

           Elite Without Being Elitist

Follow us on Twitter or visit our Facebook page and the Departmental Twitter and Facebook page

 

 

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