Scripting Bug in Fabrication Versions
There’s a bug that crept into Autodesk Fabrication versions that prevent some COD scripts from running. Any Script that accesses the Item Product list [item.product / item/product.*] will likely fail in the initial shipping version of 2026 and any prior Fabrication version’s update that was released on May 21, 2025.
Here’s what that error looks like when you attempt to run one of my scripts. The code you run may be different but you’ll see a “Simple Variable Not Expected” error in the script and the highlighted line will likely have “item.product….” somewhere in there.

This affects the scripts I have on this site including….
- WriteAllDatabaseIDs (Job).cod
- WriteAllMiscProperties(Job).cod
- Extract Product List Data (Library).cod
- WriteAllDatabaseIDs (Library).cod
- WriteAllMiscProperties(Library).cod
Here’s a list of versions that work vs have the bug…
Version | Fabrication Bug |
---|---|
2026.0.0 | Yes |
2025.0.2 | Yes |
2025.0.1 & Earlier | No |
2024.0.4 | Yes |
2024.0.3 & Earlier | No |
2023.0.5 | Yes |
2023.0.4 & Earlier | No |
Autodesk has confirmed this bug/defect and it should be fixed in an upcoming update. If you need to use COD scripts that accesses the product list data, I recommend using one of the versions without the bug until Autodesk releases a fix.
Thank you to my network for alerting me to this issue.
Scott Hendricks / Virtual Building Supply
Ken Taylor / Atlantic Constructors
Thanks also to Craig Farish at Autodesk for digging in and validating the defect and queueing up a future fix. I tend to beat up Autodesk a bit, but Craig is one of the good guys behind the scenes helping our industry.