Hi toggie, if you only see the problem with large files, probably MoI is running out of memory during the file loading - that's probably the only other explanation for that kind of partial load behavior than a failing disk.

MoI is currently a 32-bit program and so it has some limits on the amount of memory it is able to use.

One thing you can try is to alter a view setting to make a coarser display mesh which will consume less memory.

To do that, go to Options > View > "Meshing parameters" and set the "Mesh angle" option to 25 degrees and uncheck "Add detail to inflections". That will make a somewhat rougher looking shaded display but will also consume a lot less memory on complex models and that may help avoid running out of memory in the middle of the import.

I am in the process of a major rewrite of MoI for version 4 to make it 64-bit. It will still be a while before that is finished but when it is that will enable MoI to use all your system memory and that should help with larger imports then.

I'm still not sure why you see different behavior with different user accounts though, that's pretty mysterious.

- Michael

dear Michael,

thanks a lot for your detailed answer. even as this didn't solve my problem, i could learn something about the way MoI uses the RAM.
it already happened to me, when saving certain views as PDF, that i get a message that i'm out of memory. i was always surprised, since i have far enough RAM (32GB). and also the activity monitor didn't solve the mystery.
but actually i was not aware that MoI is a 32-bit program. well, this explains the issues with the RAM.
so i'm looking forward to the 64-bit version.

in case i can solve the issue with different behaviour on different users, i'll post what i found out.
but i guess, i'm simply switching the profiles, depending on what i'm working on. that's not very elegant, but it hardly needs time and works for sure.

best regards:
_toggi