Editing Slabs with recess/ledge tools

Support
1

Hi Team,

I’m reaching out regarding an issue with the slab tool that I haven’t been able to find a solution for on the forums or in the standard tutorials.

I have modelled a duplex slab and am currently attempting to add custom recesses and set downs (specifically a 100mm set down in the alfresco area). However, the command is failing to execute. The outline and dimensions appear during the placement, but they disappear as soon as I click out of the command without modifying the geometry.

Troubleshooting already performed:

  • Test Slab: I created a simple slab to the side of the main model. I was able to successfully create a void and a recess, though it required multiple attempts.

  • Inconsistency: Even on the test slab, I was unable to replicate the recess on the opposite side, regardless of the direction drawn.

  • Tutorials: I have reviewed the slab tutorials on YouTube to ensure my workflow is correct, but the issue persists.

Screenshot 2026-02-27 105907
Screenshot 2026-02-27 1059071689×969 103 KB

2

Hi CDT,

Thank you for the detailed breakdown.

I created a slab similar to what was shown in you image but I wasn’t able to replicate the issue you’re having. Can you please send any Ruby Console message that appears & a model with the issue to support@plusspec.com so I can look through it?

To get the Ruby Console Message, please follow these steps:

  1. Launch the Ruby Console (go to Extensions > Developer > Ruby Console).
  2. Recreate the steps you took to get the issue (a message should appear in the console).
  3. Select all the message text, then copy & paste it in the email.