20001103: GEMPAK color allocation

Curtis,

You probably aren't running your X display in 8 bit color mode.

Run the program "xdpyinfo". That will show what your default visual id
is, and what the depth of that display is. FOr GEMPAK, this must be 
8 bits (pseudocolor), truecolor will not work.

To configure your X server to run in 8 bit mode, you would configure
/etc/dt/config/Xservers (usually copied there from /usr/dt/config/Xservers)
so that the /usr/openwin/bin/Xsun program launches with defdepth 8.
See the manpage for Xsun for more information on this configuration.

Steve Chiswell
Unidata User SUpport

>From: "Curtis James" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200011031822.eA3IMF402553

>     Hi Steve,
>     
>        I attended your GEMPAK workshop last week, and I am fairly 
>     confident that I have installed GEMPAK correctly. However, I have a 
>     problem with color allocation. When I try to plot anything, I get the 
>     error:
>     
>     [GEMPLT -46] NCLRAL - Can not allocate read/write colors.
>     
>     I am running GEMPAK in SUNOS 5.8 on an UltraSpark IIk, but trying to 
>     display the graphics in 8-bit mode on a Windows NT machine using the 
>     Exceed for Win32 Version 6.2.0.0. When I try to run ntl, I get the 
>     following text:
>     
>     Resource File:   /usr/local/gempak/GEMPAK5.6/resource/Ntop
>     graphic, satellite, radar -- 33 32 20
>              Request total # of colors = 85
>     X Error of failed request:  Badvalue (integer parameter out of range 
>     for operation)
>       Major opcode of failed request:  86 (X_AllocColorCells)
>       Value in failed request:  0x)
>       Serial number of failed request:  283
>       Current serial number in output stream:  283
>     Exit 1
>     
>     The GUIs also crash because they can't allocate Graphic colors.
>     
>     Any assistance that you can give me will be much appreciated.
>     
>     Regards,
>     Curtis
>