[mapserver-users] Problem with Class Expression

[Marc-André D.]

Hi list,

I've searched a bit in the mailing list about this problem, but I didn't
really found any good answer to my problem.

Want I would like to do: only to show some labels between a range of scale
(1:1000 and 1:5000) based on an attribute in my shapefile.

BUT: When i uncomment the "expression" line, in my app (GeoMOOSE) I receive
a (not)nice Pink Screen Of Death and in my Apache2 log file, a segmentation
fault error show up (/msSHPLayerGetShape(): Shapefile error. Shapefile layer
has not been opened.
[Thu Mar 29 09:48:31 2012] [notice] child pid 26937 exit signal Segmentation
fault (11)/ )

Here is my problematic layer:

LAYER
    NAME 'superficie'
    DATA '../440_MRC_Coaticook/44037_Coaticook/centroide_pts.shp'
    STATUS ON
    TYPE ANNOTATION

	LABELITEM 'SUPERFICIE'
	LABELCACHE ON
	
	CLASS
		NAME 'Superficie' 
		EXPRESSION ( [AREA] >= 1 ) # the problematic line...
		MAXSCALEDENOM 5008
		MINSCALEDENOM 1008
		LABEL
			FONT vera_sans
			TYPE TRUETYPE
			SIZE 8
			COLOR 0 0 0
			POSITION CC
			FORCE true
			OFFSET 0 3
			ANTIALIAS true
		END
	END
	TRANSPARENCY 100
END #superficie



Thanks to all in advance!!

-----
-----------------------------
Marc-André Dion
B.Sc Géomatique appliquée
Université de Sherbrooke
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