In ArtiosCAD 16.1, Manufacturing files will have a wrong area calculation after double knife removal.
It affects all formulas and calculated texts using #AREA and #AREAH.
Go to Menu Info > Area. The result will be as shown in the screenshot below:
Update to version 16.1.1
There's no Hotfix for this problem due to its complexity.
The only possible workaround is to not perform the double knife removal. But it's not recommended because it can lead to further problems like wrong rule length miscalculation and double pass on Lasercut, resulting in wide cut on wood to insert the rules.