Anyone have any idea why the following metapost included in a layout causes the error below? It is almost identical to code extracted from data.mp, yet it upsets therion (I have added the 237 so you can see where the error occurs). code metapost %define colours for custom water point & area background 237 color colour_water; colour_water :=(226/255,244/255,253/255); %light blue color colour_sump; colour_sump := (22/255,22/255,95/255); %dark blue endcode D:\Program Files\Therion\therion.exe: error -- ../../StdFiles/LayoutStandards.thc [237] -- ../../StdFiles/LayoutStandards.thc [237] -- not enough option arguments -- color -- must be 2 Regards Bruce