Ahh right, didn't think of looking in the save file, here is the list:
Just to repeat, I have no issues with building either vents or coolers on vanilla/standard walls, modded walls however don't work. The blueprint appears but pawns ignore it and you can't force them to work on it. The reason I posted my list in the first place was to provide something to compare against towards the ones that had issues with standard walls.
I spent a little while now re-coding your mod and tried my results on the reinforced walls from DDA Security and More. I also spent a while comparing the def files etc between the regular walls and those as well as looking at the standard vents and coolers compared to these. I had a look at your place worker and I can't really see anything wrong, I also compared that to the code cuproPanda have for his windows mod but I couldn't see anything obvious, but it's not what I usually work with so I might be a bit blind. So now I have about 6 different versions of the vents mod working flawlessly on standard walls, but same disappointing result on the modded walls for some bizarre reason.
Code Select
<modNames>
<li>Core</li>
<li>HugsLib</li>
<li>RuntimeGC</li>
<li>Architect Sense</li>
<li>ResearchPal</li>
<li>Allow Tool</li>
<li>Autoclose Event Notifications</li>
<li>Blueprints</li>
<li>Area Unlocker</li>
<li>Wildlife Tab</li>
<li>Medical Tab</li>
<li>No Random Construction Quality</li>
<li>QualityBuilder</li>
<li>Realistic Rooms</li>
<li>Fresh stockpile filter</li>
<li>Better Workbench Management</li>
<li>Annoyance Remover v0.1</li>
<li>Limited Blight</li>
<li>Extended traits</li>
<li>Additional Traits w/ Heroes + Gods [A17 Update]</li>
<li>MT - Everyone Hauls</li>
<li>Hand Me That Brick</li>
<li>Plant Cutting is for Growers!</li>
<li>Cooks Can Refuel</li>
<li>Refactored Work Priorities</li>
<li>Force Do Job</li>
<li>Simple sidearms</li>
<li>MT - Starting Tech</li>
<li>Mad Skills</li>
<li>Wholesome Mod</li>
<li>Less Rebuff</li>
<li>No debuffs from pet killing\selling</li>
<li>More silver for traders</li>
<li>Stack XXL</li>
<li>SS Researchable Stat Upgrades</li>
<li>CatsAreCleverToo</li>
<li>CPHaulage - Combined</li>
<li>Hardworking animals A17</li>
<li>Bo's Milkable Animals</li>
<li>Facial Stuff 0.17.1.2</li>
<li>Disassemble Shield Belt</li>
<li>Reasonable Components</li>
<li>Steel extraction</li>
<li>Brainwashing</li>
<li>EcoSmart Lightbulbs for Standing, Colored and Sun Lamps (300/25)</li>
<li>Stuffed Workbenches</li>
<li>Plain Tool Cabinet V2</li>
<li>Table Diner</li>
<li>M No Death Randomness</li>
<li>M Fitness</li>
<li>Soybeans</li>
<li>Noku Mushrooms</li>
<li>Dragonfruit</li>
<li>Onion Mod</li>
<li>[T] ExpandedCrops</li>
<li>Vegetable Garden </li>
<li>Smoked meat</li>
<li>GouRIMet 1.0</li>
<li>Cupro's Drinks</li>
<li>Xen Hates People Who Exclude Bacon Cheeseburgers</li>
<li>Grill Tech V1.2</li>
<li>Soylent Production</li>
<li>Packed Lunch</li>
<li>FF_VG_canned_delights</li>
<li>Jecs Tobacco and Cigarettes</li>
<li>Rolling Table</li>
<li>Rolling Table VG Addon</li>
<li>RimFridge - A17</li>
<li>[T] ExpandedCloth</li>
<li>LT-Gardening</li>
<li>Extended Woodworking for Vegetable Garden</li>
<li>Dryxsteel</li>
<li>Cupro's Stones</li>
<li>Cupro's Alloys</li>
<li>DDA Security and More</li>
<li>Glass+Lights</li>
<li>ConcreteWalls</li>
<li>Roof Support A17</li>
<li>Stuffed Floors</li>
<li>Fences And Floors</li>
<li>[T] MoreFloors</li>
<li>Floored Re-Reupload A17</li>
<li>Tilled Soil</li>
<li>Buildable Terrain A17</li>
<li>[RF] Fertile Fields [a17]</li>
<li>[RF] Fertile Fields - Concrete Add-On [a17]</li>
<li>Patchwork Leather</li>
<li>GenLeather</li>
<li>Ultraweave</li>
<li>Dubs Hygiene and Central Heating</li>
<li>More Furniture (A17)</li>
<li>Clutter Furniture Module</li>
<li>RIMkea</li>
<li>[T] MoreBedsVanilla</li>
<li>QualitySurgeon</li>
<li>Improved Surgery</li>
<li>DE Surgeries</li>
<li>Harvest Everything!</li>
<li>Expanded Prosthetics and Organ Engineering 2.0</li>
<li>A Dog Said...</li>
<li>Fast regen A17 </li>
<li>NeuTech Advanced Medical Pod</li>
<li>[sd] medicaddons</li>
<li>Glitterworld Medicine</li>
<li>Dubs Rimkit(Medkit)</li>
<li>Mod Medicine Patch</li>
<li>AnimalCollabProj</li>
<li>AnimalCollabProj ADS Patch</li>
<li>LBE's Australian Wildlife</li>
<li>More Vanilla Turrets</li>
<li>USCM - Core</li>
<li>RT's Weapon Pack</li>
<li>20th Century Weapons Mod (20CWМ)</li>
<li>High Caliber</li>
<li>Project Fallout v1.5</li>
<li>V_Garden Project Fallout Patch </li>
<li>Rimsenal</li>
<li>Rimsenal - Enhanced Vanilla Pack</li>
<li>Rimfall: The Frontier (1.31) A17</li>
<li>[A17] Expanded Vanilla Weaponry </li>
<li>Ancient Asian Weapons</li>
<li>Halo - Weapons</li>
<li>Moritz´s LegendaryWeapons</li>
<li>DTC Weapon Overhaul - Firearms V2.2</li>
<li>DTC Weapon Expansion - Melee V2.1</li>
<li>Cyberpunk</li>
<li>Remote Explosives</li>
<li>Quantum Cooling</li>
<li>[sd] advanced powergeneration</li>
<li>Chemfuel Generator</li>
<li>Efficient batteries</li>
<li>SS Bigger Batteries</li>
<li>RT Fuse</li>
<li>SS Battery Fuse</li>
<li>Reinforced Indiscernible Power Conduits</li>
<li>Floor Lights</li>
<li>LED Lights</li>
<li>Wall Light</li>
<li>ED-Laser Drill</li>
<li>BetterCoolers</li>
<li>BetterVents</li>
<li>Additional Joy Objects</li>
<li>Pawns Play Poker</li>
<li>Pawns Paint!</li>
<li>LT-DoorMat</li>
<li>Dye Vat</li>
<li>Area Rugs A17</li>
<li>Change Dresser</li>
<li>[SS]Maid Project</li>
<li>Repair Workbench</li>
<li>Mending</li>
<li>ED-OmniGel</li>
<li>Call of Cthulhu - Industrial Age</li>
<li>Training Console A17</li>
<li>Animal Feed Trough V1.1 [V.G.]</li>
<li>Barn Stall V1.0</li>
<li>[sd] chicken nest</li>
<li>[RF] Basic Bridges [a17]</li>
<li>Mass Graves</li>
<li>Quarry</li>
<li>Apparello 2</li>
<li>FashionRIMsta</li>
<li>High Tech Laboratory Facilities</li>
<li>Nackblad Inc Rimhair</li>
<li>Spoons Hair Mod</li>
<li>[SS]Lovely Hair Style</li>
<li>Xeva's Rimhair (A15, A16, A17)</li>
<li>VOHAIR</li>
<li>Rimsenal - Rimhair</li>
<li>[A17]My Cute Ear</li>
</modNames>
Just to repeat, I have no issues with building either vents or coolers on vanilla/standard walls, modded walls however don't work. The blueprint appears but pawns ignore it and you can't force them to work on it. The reason I posted my list in the first place was to provide something to compare against towards the ones that had issues with standard walls.
I spent a little while now re-coding your mod and tried my results on the reinforced walls from DDA Security and More. I also spent a while comparing the def files etc between the regular walls and those as well as looking at the standard vents and coolers compared to these. I had a look at your place worker and I can't really see anything wrong, I also compared that to the code cuproPanda have for his windows mod but I couldn't see anything obvious, but it's not what I usually work with so I might be a bit blind. So now I have about 6 different versions of the vents mod working flawlessly on standard walls, but same disappointing result on the modded walls for some bizarre reason.