If I do remember correctly what I was doing to detect bowties in a pline was to �overlaynodes� the pline with itself and check if the number of nodes is different between the original and the result of the overlay.
It seems that with 6.5 it does not work anymore. No node are created where the pline passes over itself Yes, I am one half behind and so are many of us. But this is another annoying undocumented change of behaviour. I think that I will have to survive with an overlaynodes between the object converted to region and id., and check for changes in the number of nodes of the converted to region pline and the results of the overlaynodes, I would love to know if I am wrong in thinking that it used to work with plines> Jacques Paris e-mail [EMAIL PROTECTED] MapBasic-MapInfo support http://www.paris-pc-gis.com
