hi all,

the algorithm i am busy with is this:
(solid) --(set frames)--(sections of solid) --
(planar surfaces from sections) --(calc.of areas)--(list of areas)--
(calc. of total area)i have two problems;
when i use the PLANAR component, i get one extra surface that i haven't asked for. Any idea why? And how to avoid / fix this ?
Second: how can i add the items within a list to produce an overall number ?
Hope the questions are clear enough, thank everyone for your time for even reading this.
Kostas
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