I have downloaded the latest spatialite-gui v.1.4.0. (spatialite version 2.4.0.) When I try to correct invalid geometries and I use the following string (that I use to use with the past version):
UPDATE com2011 SET geometry = ST_MakeValid(geometry)
WHERE ST_IsValid(geometry) = 0;
This string does not work at all! It seems that ST_MakeValid(geometry) is a command that is not working anymore!
How can I remedy this problem or can you tell me the new string?