Hi Sebastian, in e-mail you mentioned that it did finally export out of MoI but only after letting it sit overnight.

So it appears to be not a crash or actual lock-up bug but a performance issue, my guess is that it probably has something to do with this particular situation of having a high number of trim curves contained within a single surface.

I'll investigate it, but I'm not sure yet when that will lead to a solution, it may take a variety of different tests and also some back and forth with the author of the I/O libraries that MoI actually uses to do the export. It's something that will need tuning in the library, not in MoI's own code directly.

So I probably won't have an answer for you right away on why the export from MoI for this model takes so long, but I will try to find out what is happening and if it can be improved though.

In the meantime some of the methods that I described above can probably help to get your work done now - try doing the holes in Alibre, or try using 3DM import into Alibre with the settings as I showed above.

- Michael

I got a surface with 3200 x 1.2mm holes, export without any problem in under a minute... there's clearly something wrong here !

Hi DesuDeus, is your one a solid with little tubes also joined to the holes or just an individual surface?

- Michael

Individual surface, that's why :)
There's the tubes also but not the backface !

But I'm pretty sure that I tried to export the whole solid and it worked but it was too high polycount so I decided to do it with surfaces.
At this time I was on an i7 920 @ 3.5ghz and with 6gb of memory. It's better to export a cube before with low angle settings like 20° then export the solid, so that your exporter is set to 20° and not 5° for example !