HTML legend not created in mapserver 4.6.1

[Vito Meuli]

Hello,

I have a problem with the HTML legend:

I have a mapfile with a HTML legend, and everything went fine until now.

My mapfile is becoming larger, and it seems that when the number of group of 
layers in the mapfile grows (I guess more than 12 groups), then the map is 
generated but not the legend any more, without giving any error, so I don't 
understand what the problem is.

In the source code I can't find anything like #MAXGROUPS or the like.

Do you have any idea?

Many thanks in advance!
Vito