[GRASS5] 5.7.0 nviz2.2_script Error

GRASS GIS GRASS GIS developer
1

Greetings,

Testing out NVIZ with GRASS 5.7.0/5.4.0 here. Looks nice, congratulations on the releases!

With 5.7.0, if I invoke "nviz -q", it works fine. If I start nviz with no arguments, it starts a wish GUI titled "nviz2.2_script", if I choose a raster and hit "Run", I get a dialog stating: "Error: can not find channel named "couldn't execute "nviz_2.2_script": no such file or directory". similarly, if I choose the "Display" - > "Start NVIZ ()" from the Tcl/Tk GUI I get the same error:

can not find channel named "couldn't execute "nviz2.2_script": no such file or directory"
can not find channel named "couldn't execute "nviz2.2_script": no such file or directory"
while executing
"fconfigure $msg -blocking 0"
invoked from within
".run invoke"
("uplevel" body line 1)
invoked from within
"uplevel #0 [list $w invoke]"
(procedure "tk::ButtonUp" line 23)
invoked from within
"tk::ButtonUp .run"
(command bound to event)

I have looked around a bit and I cannot find what would cause the problem. Any hints would be appreciated.

Thanks,

Jeshua Lacock __________________________
Programmer/Owner Phone: 877.240.1364
http://OpenOSX.com Fax: 415.462.6211
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_

2

Jeshua Lacock wrote:

With 5.7.0, if I invoke "nviz -q", it works fine. If I start nviz with
no arguments, it starts a wish GUI titled "nviz2.2_script", if I choose
a raster and hit "Run", I get a dialog stating: "Error: can not find
channel named "couldn't execute "nviz_2.2_script": no such file or
directory". similarly, if I choose the "Display" - > "Start NVIZ ()"
from the Tcl/Tk GUI I get the same error:

can not find channel named "couldn't execute "nviz2.2_script": no such
file or directory"
can not find channel named "couldn't execute "nviz2.2_script": no such
file or directory"
while executing
"fconfigure $msg -blocking 0"
invoked from within
".run invoke"
("uplevel" body line 1)
invoked from within
"uplevel #0 [list $w invoke]"
(procedure "tk::ButtonUp" line 23)
invoked from within
"tk::ButtonUp .run"
(command bound to event)

I have looked around a bit and I cannot find what would cause the
problem. Any hints would be appreciated.

In 5.7, the default "interactive" behaviour (when you run a command
without arguments) is to spawn "wish", feed it Tcl/Tk code which
generates an options dialog, then exit. When you press the "Run"
button, the Tcl/Tk code re-executes the program with the selected
options.

The name of the program is taken from argv[0], as passed to
G_parser(). For a typical GRASS module written in C, this is correct.
For NVIZ, it appears to be nviz2.2_script. This isn't in the path, and
even if it was, it can't be executed directly.

One possibility is to "fix" argv in parse_command() (in nviz_init.c),
so that argv[0] is "nviz", e.g.

  char *saved_argv0 = argv[0];

  ...

  argv[0] = "nviz";

  if (G_parser(argc, new_argv))
    exit(0);

  argv[0] = saved_argv0;

--
Glynn Clements <glynn@gclements.plus.com>

3

On Nov 8, 2004, at 1:04 AM, Glynn Clements wrote:

Jeshua Lacock wrote:

With 5.7.0, if I invoke "nviz -q", it works fine. If I start nviz with
no arguments, it starts a wish GUI titled "nviz2.2_script", if I choose
a raster and hit "Run", I get a dialog stating: "Error: can not find
channel named "couldn't execute "nviz_2.2_script": no such file or
directory". similarly, if I choose the "Display" - > "Start NVIZ ()"
from the Tcl/Tk GUI I get the same error:

can not find channel named "couldn't execute "nviz2.2_script": no such
file or directory"
can not find channel named "couldn't execute "nviz2.2_script": no such
file or directory"
while executing
"fconfigure $msg -blocking 0"
invoked from within
".run invoke"
("uplevel" body line 1)
invoked from within
"uplevel #0 [list $w invoke]"
(procedure "tk::ButtonUp" line 23)
invoked from within
"tk::ButtonUp .run"
(command bound to event)

I have looked around a bit and I cannot find what would cause the
problem. Any hints would be appreciated.

In 5.7, the default "interactive" behaviour (when you run a command
without arguments) is to spawn "wish", feed it Tcl/Tk code which
generates an options dialog, then exit. When you press the "Run"
button, the Tcl/Tk code re-executes the program with the selected
options.

The name of the program is taken from argv[0], as passed to
G_parser(). For a typical GRASS module written in C, this is correct.
For NVIZ, it appears to be nviz2.2_script. This isn't in the path, and
even if it was, it can't be executed directly.

I thought that might be what was happening.

One possibility is to "fix" argv in parse_command() (in nviz_init.c),
so that argv[0] is "nviz", e.g.

  char *saved_argv0 = argv[0];

  ...

  argv[0] = "nviz";

  if (G_parser(argc, new_argv))
    exit(0);

  argv[0] = saved_argv0;

Thanks Glynn, as always, you rock!

Thanks again,

Jeshua Lacock __________________________
Programmer/Owner Phone: 877.240.1364
http://OpenOSX.com Fax: 415.462.6211
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_

4

On Mon, Nov 08, 2004 at 01:16:55PM -0700, Jeshua Lacock wrote:

On Nov 8, 2004, at 1:04 AM, Glynn Clements wrote:

>
>Jeshua Lacock wrote:
>
>>With 5.7.0, if I invoke "nviz -q", it works fine. If I start nviz with
>>no arguments, it starts a wish GUI titled "nviz2.2_script", if I
>>choose
>>a raster and hit "Run", I get a dialog stating: "Error: can not find
>>channel named "couldn't execute "nviz_2.2_script": no such file or
>>directory". similarly, if I choose the "Display" - > "Start NVIZ ()"
>>from the Tcl/Tk GUI I get the same error:
>>
>>can not find channel named "couldn't execute "nviz2.2_script": no such
>>file or directory"

...

>One possibility is to "fix" argv in parse_command() (in nviz_init.c),
>so that argv[0] is "nviz", e.g.

...

Thanks Glynn, as always, you rock!

I have submitted the fix to 5.7-CVS.
Thanks, Glynn (working here as well now).

Markus