Re: [ferret_users] white contours

["william s. kessler" <william.s.kessler@xxxxxxxx>]

Yes, this happens occasionally with white lines. I assume it is a bug  
somewhere. A *possible* fix: redefine one of the colors to something  
that is very near white. Sometimes this will avoid the problem.  
Choose a pen number that is otherwise unused:

ppl color,6,99,99,99   ! pen 6 is otherwise not used
contour/over/color=6 .....

Remember that if the PPL COLOR command is used to redefine a  
particular color more than once in a plot, unpredictable results can  
occur. There are some examples of this behavior in the user  
discussions from the last century, I think.

Billy K




On 3Oct 2007, at 1:46 PM, nguyen@xxxxxxxxxx wrote:

> Hi ferreter
>
> I have a figure with white contour. When I convert it to a postscript
> file, this following message appear and all the contours/shading  
> following
> the white contour, including the white contour are not appeared on  
> the .ps
> file. Any idea?
>
> > ERROR: /typecheck in --aload--
> > Operand stack:
> >     --nostringval--
> > Execution stack:
> >     %interp_exit   .runexec2   --nostringval--   --nostringval--
> > --nostringval--   2   %stopped_push   --nostringval--   -- 
> > nostringval--
> >    --nostringval--   false   1   %stopped_push   1   3   %oparray_pop
> > 1   3   %oparray_pop   1   3   %oparray_pop   1   3   %oparray_pop
> > .runexec2   --nostringval--   --nostringval--   --nostringval--   2
> > %stopped_push   --nostringval--   --nostringval--
> > Dictionary stack:
> >     --dict:1123/1686(ro)(G)--   --dict:0/20(G)--   --dict:124/200 
> > (L)--
> > Current allocation mode is local
> > Current file position is 188694
> > ESP Ghostscript 815.04: Unrecoverable error, exit code 1
> Thanks
> Hanh