[news.eclipse.technology.laszlo] undefined superclass basecomponent for

[philippe.hublin@xxxxxxx (philippe)]

I try to build the follow sample with IDE 4 Laszlo (last release):

<?xml version="1.0" encoding="UTF-8" ?>
<canvas>
<include href="incubator/roundrectbutton.lzx"/>
<roundrectbutton text="button" height="20"/>
</canvas>


When I switch to design view, the message "undefined superclass 
basecomponent for class roundrectbutton" occurs

I have tried to modify the line "<include 
href="incubators/roundrectbutton.lzx"/> with <include 
href="..\..\lps\components\incubator\roundrectbutton.lzx"/> but I have 
always the same message.

my project is created under lps-3.2.

If I use the standard components, all works correctly
Thanks in advance