# BC seems applied to the wrong Selection **URL:** \ **Category:** Bug Reports\ **Created:** [February 14, 2024, 12:29pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508 "2024-02-14T12:29:58Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [February 14, 2024, 12:29pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/1 "2024-02-14T12:29:58Z")
Not sure why my results are not as expected. I’m still working on the set up but in the meantime I have found the following : The two intermediate BC’s of the first and second step were imposed at the lip of the plate as show in the preview. After my results is not as expected I’m reviewing each BC again and found that when opening the BC details, the selected surface suddently changes its possition. Is that normal?. Now I’m not sure where the BC is aplied?¿ ![screenshot.51](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/2/2f88ea3db846b4fae57c2a8a782c182ab6a8eb3b.jpeg) ![screenshot.53](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/9/9425e8935cc051188bbe4fed691431dbf4679463.jpeg) I haven’t clear anything to avoid altering the possible bug. > **[Bolted\_Clip\_Basics\_Shear.pmx](https://wetransfer.com/downloads/73f540bf777e7cf963beb7af2ff2474c20240214122536/314539)** > > 1 file sent via WeTransfer, the simplest way to send your files around the world ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [February 14, 2024, 12:44pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/2 "2024-02-14T12:44:21Z")
Now I can see that the problem is not a high stiffness. Overall displacement doesn’t agree with the requested value of -150mm although the analysis reports as ended successfully. EDITED: I have rebuild the whole model from zero and result is as shown in the picture. Still don’t know why BC was assigned to other area. ![imagen](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/c/c39e7f9b1cffd1e1059c678d0b94268bc6ece4f2.png) ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [February 14, 2024, 12:55pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/3 "2024-02-14T12:55:14Z")
> [@ANYS](#): > > After my results is not as expected I’m reviewing each BC again and found that when opening the BC details, the selected surface suddently changes its possition. Is that normal? No, that is not supposed to happen. Thank you for the file. I will try to determine what is the problem. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [February 19, 2024, 8:32am UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/4 "2024-02-19T08:32:03Z")
> [@ANYS](#): > > where the BC i I went through your model and think the problem is the Scale function. Now, I will try to find the best way to fix this for the future. ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [February 19, 2024, 12:27pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/5 "2024-02-19T12:27:30Z")
Thank you Matej. May I ask how do you know that I scaled the mesh? Does Prepomax .pmx records the commands that are executed? ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [February 19, 2024, 1:14pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/6 "2024-02-19T13:14:29Z")
Yes, all the commands can be seen using the Edit → View History menu. Currently, it is only a read-only list. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [February 19, 2024, 1:15pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/7 "2024-02-19T13:15:50Z")
> [@Matej](#): > > I went through your model and think the problem is the Scale function. Now, I will try to find the best way to fix this for the future. I have reworked the code dealing with changes due to translation, scaling, and rotation. I hope it will not introduce some other problems. It will be released in the next version. ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [February 20, 2024, 10:28am UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/8 "2024-02-20T10:28:34Z")
Thank you very much Matej. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [May 12, 2024, 6:13pm UTC](https://prepomax.discourse.group/t/bc-seems-applied-to-the-wrong-selection/1508/9 "2024-05-12T18:13:10Z")