Can't remove basefeature

[kisolre]

I was designing three cylindrical parts. Since they are almost identical I created the first one (constrained sketches and all) and then made one copy(duplicate selected object with all dependencies), removed features, changed dimensions from properties panel. From it I created another duplicate and edited it again. I saved the file (Panti_Ok.fcstd is that state from backup) and exported STL. This is how it looks

Panti_Ok.JPG (145.95 KiB) Viewed 945 times

Then I took the actual measurements. I had to adjust the height of the Nut1.Pad003 and sometimes afted that I noticed that Body does not look right. It turned out that it suddenly had Basefeature linked to Pad003.

Panti.JPG (152.3 KiB) Viewed 945 times

This is in file Panti.FCStd. I can't explain how that happened. I had a similar problem with clones in another file before https://forum.freecadweb.org/viewtopic.php?f=3&t=33448 - they suddenly pointed to wrong body.
The problem is that I can't remove the Basefeature from Body. I try to remove the link from Body to BaseFeature in properties panel but the Basefeature remains under Body. Link from Body.Basefeature is missing but Basefeature is still present even after file recompute and Pad still depends of Sketch and Basefeature. Trying to delete Basefeature after removing the link complains about Pad depending of Basefeature. If I confirm that everything looks fixed. But I tried another thing which I did before - moving features to the end of the body and deleting them there. But here this creates new Basefeature001 linked to Chamfer001 and the Body again has a Basefeature (Basefeature001) thus creating circular dependency.

Another thing that popped out is an error in the undo function with Panti_Ok.FCStd. I mistakenly changed Nut1.Pad003.Sketch004.Constraint2 to 4 instead of the pads length. I tried to undo it but it stayed at 4. I also tried with 5 with the same result.

OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15969 (Git)
Build type: Release
Branch: master
Hash: 4765b7e2fe6d3609e9fbf3e3eb6648d7af1dd526
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Bulgarian/Bulgaria (bg_BG)

Tried the same with the latest windows build with same results:
OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15991 (Git)
Build type: Release
Branch: master
Hash: 10c745175f8a121b594ee6b0612cc487ebf43ba1
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Bulgarian/Bulgaria (bg_BG)

[NormandC]

The problem is that I can't remove the Basefeature from Body. I try to remove the link from Body to BaseFeature in properties panel but the Basefeature remains under Body. Link from Body.Basefeature is missing but Basefeature is still present even after file recompute and Pad still depends of Sketch and Basefeature. Trying to delete Basefeature after removing the link complains about Pad depending of Basefeature. If I confirm that everything looks fixed.

For me, just deleting BaseFeature from the tree works.

OS: Ubuntu 18.04.2 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15997 (Git)
Build type: Release
Branch: master
Hash: fcd3fe0a464a4e94897ccfc81c7ef6730a60a5b4
Python version: 2.7.15rc1
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: French/Canada (fr_CA)

[HarryGeier]

Same here, i deleted the base feature, disregarded the warnings and it looks fine so far.

I would have done such using a master Sketch or a Table and then derive the constraint values of the 3 independent bodies all from that . The use of a base feature her is not realy obvious to me.

[HarryGeier]

I see you did not have that base feature in the OK file.
So it looks as if it was created accidentially. I played a few minutes, changed all sorts of properties and values..nothing bad happened.
So my questimate: You once where in One body, selected something from the other body chged it and somehow this created the base feature.. So the soultion is to find out the piece of wrong workflow.

[kisolre]

Same here, i deleted the base feature, disregarded the warnings and it looks fine so far.

I would have done such using a master Sketch or a Table and then derive the constraint values of the 3 independent bodies all from that . The use of a base feature her is not realy obvious to me.

In my post I try to explain that those are three totaly diferent bodies each with its own features, sketches, constraints.... Since they look similar I made one, duplicated and then changed the others. I did not use Basefeature intentionally. The link just randomly appeared. And when I tried to remove it I observed the described behavior.