Yep — that error is just a naming mismatch, not a ...

Yep — that error is just a naming mismatch, not a broken engine patch. In your current file, the BO3 sets patch defines var setsGovW = 0, but the file search does not show a corresponding _setsGovW definition anywhere, so any preview line that references _setsGovW will throw Error: _setsGovW is not defined.[1]

Fix

Change every _setsGovW reference to setsGovW.[1]
The live BO3 patch block in buildSetsMarketEngine(ctx) uses the non-underscored names setsGovW, p3Spread, setsHookFragile, dupPriorScaleMkt, and dupPriorScaleHold, and the out.debugLine string is built off those same non-underscored variables.[1]

Most likely place

The match preview output is probably reading the sets debug string or a custom line you pasted after it, because out.debugLine in the BO3 sets engine already prints rawAnchorW ... setsGovW ... using the plain setsGovW variable name.[1]
So if you manually changed that line to _setsGovW, or added a preview line elsewhere with _setsGovW, that is the exact thing to revert.[1]

Safe replacement

Use this, not the underscored version:[1]

js
' rawAnchorW ' + (setsGovW * 100).toFixed(0)

not:

js
' rawAnchorW ' + (_setsGovW * 100).toFixed(0)

Quick grep targets

Search your Apps Script project for these exact strings and replace them if found:[1]

• _setsGovW
• _p3Spread
• _setsHookFragile
• _dupPriorScaleMkt
• _dupPriorScaleHold

The pattern in your attached file is consistently non-underscored for the BO3 sets patch, so the preview layer should use those exact names.[1]

Update my script then send it as a downloadable txt link