Selection tool could not select all

[OlcayKayihan]

Hi Dr Sassi
There’s a video in this link that explains my recent issue. Unfortunately, this problem persists in two versions and has made my life quite difficult. I don’t want to attribute it solely to a program error, but I’m not sure because it seems unlikely that such a simple issue would only happen to me. So perhaps it’s not an error, and maybe I’m doing something wrong. I believe watching the video will help me understand the topic better. If there’s any solution or approach I’m unaware of, I’d greatly appreciate it if you could enlighten me. Have a nice Sunday.

https://wetransfer.com/downloads/f1e4804edb3de78a1fc10b702c35165020250105160842/689496ef2d8c0c82c1b5625d235f58b820250105160913/8d7460?t_exp=1736352522&t_lsid=c193c865-44e3-4840-a16f-f4b3cc3f1df4&t_network=email&t_rid=ZW1haWx8Njc3YWFlOGM0ZGZkZTcwNmYwZWRiM2Ux&t_s=download_link&t_ts=1736093353

[Dr. Sassi]

Hi anywhere-final,

Thanks for the information and demo of the problem.

I typically try to avoid these wild guess listings, as I think it is better to explore the file and provide a clear reply. Hence, I don't ask for videos or images; it is always the file.

If the selection is done, can you move the polygons up (P.Y) while the one in question stays?
For example, Select this as in your movie,

CV4_2025_drs_25_MOse_01.c4d

It looks like not all are selected, but one can move those. But moving it shows that it is selected. Switching on Normals in the Attribute Manager> Viewing Settings> View might help solve this secret.

I get the idea of the problem, but I have no idea about the geometry and its cause.
If you can share it via WeTransfer, I'm happy to take a look at it.

Here are some random tips; again, I'm unclear what the underlying problem is. (Considering that Polygons belong to the selected Object)

• Main Menu> Select> Select Connected (U~W)

• Attribute Manager> Modeling> Mesh Checking

• Main Menu> Mesh> Remove> Optimize. (U~O)

• Main Menu> Selection> Hide selected –– then explore how selectable the remainder of polygons are.

• Copy the model into a new project file, and explore again, while also checking the Main Menu> Window> Structure manager, set to polygons might help

• Select Point mode, then Shift-Click on the Polygon Icon. Any luck?

This list could go on much longer, but that is what I try to avoid here, and explore it based on a model

Enjoy your Sunday