I work for a house builder who produce site plans for construction and I have recently introduced CAD Standards. We now use one base drawing which is referenced into layout drawings. All is well for working drawings, but when we try to produce a coloured layout for marketing the drawing crashes, will not reopen and kicks you out of AutoCAD if you try to recover it. All we are doing is referencing the base drawing into model space and the referenced drawing is then coloured using solid hatch. We can only hatch a certain amount (not always the same) before this occurs and this has happened on a number of our drawings. The layout drawings average around 1Mb to 2Mb. The other strange things we have had on these particular drawings is MText copying itself many times on top of each other. Anyone got any suggestions?