I need to force column widths to values smaller than the indesign preset minimuns (1,058mm).

Jongware provided two ideas for forcing a table's rows and columns into heights and widths smaller than the Indesign preset 1.058mm.

For rows: app.selection[0].properties = {autoGrow:false, height:"0.5mm"};

And for columns he sugested: app.selection[0].width = "0.5mm";

The problem is that while the code for rows works perfectly, the one for columns returns an error "Expected Unit, but received 0.5mm" I'm running Indesign cs6. Anyone has any insights to help fixing such script, or maybe some different approach? Thanks!