[KARMA]

it may be useful for you, or maybe not,
btw i have this simple shape causing pcs134 crashing while conversion.
same mesh is converted w/o problems by pcs101.  
same mesh is converted w/o problems by 134 if triangulized

[KARMA]

well while posting i discovered the problem:
i made a stupid error sweeping (the extrusion in the middle), causing a "false single edge", when you see a single edge but instead there are 2 or more edges that have same position
personally it is not  so important for me, since i usually check manually most of the vertices to avoid this situaotin, in this case i just missed it, well maybe it could be even positive since it tells me that i made this mistake, btw i don't know if others may have problems, since old pcs never had this prob