Modelling operation error

[brad.261295]

I have a 3d piping model that I have created using mostly Autocad 2010 solids and some Cadworx 2010 piping. I get an occasional error upon opening that says "Modelling operation error: Missing integer in restore file" I then have to find an Autosave .bak file, rename it and continue along. Any thoughts? I was saving only to our server but tried last night to also save to my Desktop - this morning both files (server and desktop) were corrupt. Lot's of frustration here today!

[dgorsman]

Its possible for automation in AutoCAD to create solids that AutoCAD can't handle well. I've had it done (with CADWorx), where a client wanted bends in the pipe as installed. Running the pipe over the spline resulted in a cylinder that "broke" AutoCAD 2008 when XREF'd. I think there was a mention on the CADWorx discussion groups about reducers generating a similar problem as well with earlier versions of CADWorx 2010.

Quarter and search the model until you can isolate the objects which cause the problem then find a way to redo them.

AutoCAD 2011 seems to handle this type of problem better.