[mapserver-users] Changing map file parameters via a form or a URL EXPRESSION

[stefanoferri]

Hello everybody,
I tryed to use "Changing map file parameters via a form or a URL" and i had
success in modify for example the color of a layer in this way:

map.layer[cities].class[0].style[0]=COLOR+0+255+0, 

but if i try to modify the EXPRESSION with this: 

map.layer[cities].class[0]=EXPRESSION+([gid]<100)

i get this error:

"loadClass(): General error message. URL-based EXPRESSION configuration
failed pattern validation. msValidateParameter(): Regular expression error.
Parameter pattern validation failed. "

where do i wrong???
thanks for the help
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