# (A22) So I tried to put a roof on this Engineer's Building I made **URL:** \ **Category:** Other Reports\ **Tags:** duplicate\ **Created:** [December 20, 2017, 3:40am UTC](https://discourse.stonehearth.net/t/a22-so-i-tried-to-put-a-roof-on-this-engineers-building-i-made/33073 "2017-12-20T03:40:38Z")\ **Posts on this page:** 3\ **Page:** 1

**Author:** ![TacticalMaster](https://avatars.discourse-cdn.com/v4/letter/t/7ba0ec/32.png) [@TacticalMaster](https://discourse.stonehearth.net/u/TacticalMaster)\ **Post date:** [December 20, 2017, 3:40am UTC](https://discourse.stonehearth.net/t/a22-so-i-tried-to-put-a-roof-on-this-engineers-building-i-made/33073/1 "2017-12-20T03:40:38Z")

**Summary:** Kinda my complex personal building I made for my engineer. Tried to simulate “gear” decos with just slabs. 😕 When I tried to add a roof to the lower floor of my Engineer’s Building by hovering my roof tool on the left side of my “Engineer’s Building”, suddenly I get an error message pertaining some sort of engine error. After that, it seems like I can’t add roof on that side of the building anymore. _However_, the tool is not completely broken. I can apply roofs to any other buildings with enclosed wall spaces. That space was also enclosed so I just closed the error window on a whim and just kept constructing my building up to the second floor. I had to restart my game and reproduce the bug again just so I can show the bug again…It was a good thing it’s there. Suspectibly a bit different though. Sigh. So for now on, I had to manually add that roof by using slabs. Which, however, creates an unintended visual effect for slabs since the “roof” was built through slabs. **Steps to reproduce:** 1. Create first floor walls on a foundation floor. 2. Partially cover a portion or about half of the top using the floor tool. 3. Create second floor walls 4. Create decorative slabs on the walls outside the building, 6 blocks high as the walls. 5. Attempt to apply roofing on the first floor (hover mouse over wall). **Expected Results:** _N/A_ **Actual Results:** _N/A_ **Note** As I said before, this happened _before_ I built the second floor on the right side of the building. Perhaps it’s probably all of those slab corners I built? Even though they were level with typical wall height (6 blocks)? Or maybe it’s the roof overhang that’s causing this? They were all set to 1 and I kinda overlooked it before applying the roof. Also, the walls were “free-standing” types, not auto-generated. Just so that I can achieve a proper “lumbered” building aesthetic. **Attachments:** ![Roof Preview Bug (1)](https://us1.discourse-cdn.com/flex022/uploads/stonehearth/original/3X/d/6/d62191b2b177de526f9dd362ace569759cfdee64.jpg) ![Roof Preview Bug (2)](https://us1.discourse-cdn.com/flex022/uploads/stonehearth/original/3X/5/5/55040a7e304253759967eee30b8836837db25bac.jpg) **Version Number and Mods in use:** release-763 (x64) | No mods (Vanilla) **System Information:** Windows 10 64 Bit | AMD FX™-6300 | 16GB RAM Memory | EVGA NVIDIA GeForce GTX 960 4GB ACX 2.0 ---

**Author:** ![Relyss](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.stonehearth.net/relyss/32/41785_2.png) [@Relyss](https://discourse.stonehearth.net/u/Relyss)\ **Post date:** [January 3, 2018, 5:57pm UTC](https://discourse.stonehearth.net/t/a22-so-i-tried-to-put-a-roof-on-this-engineers-building-i-made/33073/2 "2018-01-03T17:57:02Z")

Split this topic on January 3, 2018, 5:57pm UTC 5 posts were merged into an existing topic: [Engine Error - Assertion Failure](https://discourse.stonehearth.net/t/engine-error-assertion-failure/27851) ---

Closed on January 3, 2018, 5:57pm UTC