[Mapserver-users] Class Expression help

[Nick Petersen-Bergeron]

I'm trying to do a class based layer structure for a map program I'm 
writing.  I've looked through all of the syntax examples for expressions 
that I can find, but can't seem to figure out what's wrong.

I have around 20 classes in the layer.  Essentially the only thing that 
will differ between classes is the color.

I've included an example of one of the classes.

CLASS
                 EXPRESSION "(('[TEMP]' eq 'normal') AND ('[PRECIP]' eq 
'normal') AND ([LEVEL] eq 0) AND ([DAY] eq 30))"
                 COLOR 50 50 50
                 SIZE 5
                 NAME "normal_city"
                 SYMBOL "circle"
                 LABEL
                         COLOR 50 50 50
                         FONT arial
                         SIZE 12
                         POSITION ur
                         ANTIALIAS TRUE
                         TYPE TRUETYPE
                 END
         END

Can anyone see a problem with this?

When I comment out a single expression, the shapefile I'm using defaults to 
using that class, so I'm guessing that none of the expressions are 
evaluating to true.  However, the dbf for the shape seems to indicate that 
this should not be the case.  The only error being thrown is the following:


Thu Jul 17 10:41:37 2003 - msSearchDiskTree(): Unable to access file. 
Unable to open spatial index for /home/wcs/html/data/countries2.qix. In 
most cases you can safely ignore this message, otherwise check file names 
and permissions.


Thanks for your help.

Nick Petersen-Bergeron
System Administrator

ZedX Inc.
369 Rolling Ridge Drive
Bellefonte, PA. 16823