This has been an issue for users for OVER FOUR YEARS.

Here's one early thread on the subject: viewtopic.php?f=9&t=2309&p=9366&hilit=o ... fill#p9366

There have been many suffering from this deficiency. Another old issue that really needs attention!

No probs. Its not your fault....its a lack of interest by the S3D developers to ensure the slicer can be used efficiently by the users.

This may just simply be printing at too fast a speed. And if its on the first layer, it may be the printing is a little too high for the printed filament to adhere properly.

You didn't add any.....and neither did I.

The utility added in v3...I think it was....Separate Connected Surfaces has been mentioned 205....sorry, 206....times in the forum...and almost 84 of those times has been by me in response to reports of S3D not slicing correctly and leaving small gaps in the sliced model. All of these have been rela...

Simple and rational explanation!

The stl has two meshes in it....and S3D....as you know.....finds difficulties dealing with multiple meshes in single stls.

Use the Separate Connected Surfaces option......and the support generates as you would expect it to.

I very mush am not convinced there is any issue with S3D here.....and I have a fear that you will continue to lose your profiles and data unless you change the way you work.....but I also fear you will not do so and continue to blame the software for you not saving your data correctly. One bit of go...

...…..I removed the automatic supports from fours holes. They don't show up in Preview mode,

Well they do for me......

My guess is that it has nothing to do with your settings....and everything to do with your model.

And I can't prove either....because I can't investigate the model!....because I don't have access to it.

I know why you can't get supports to apply......but I don't have the technology to sort the issue out. The shape file is not manifold ….ie every face is single-sided and there are two big holes in the object - the top and the bottom. I'm actually amazed that S3D has even sliced it! And the reason wh...