Move the geometry near the origin (coordinates 0,0) to prevent alignment errors. Export the selection as a file (ideally version 2000).

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*PatternName, Description angle, x-origin, y-origin, delta-x, delta-y, dash1, dash2, ...

: Avoid patterns with thousands of elements to prevent performance lag. 2. Positioning and Export Move to Origin : Move your pattern tile near the coordinates to avoid alignment glitches. Export to DXF : Many converters prefer the DXF (AutoCAD 2000 version) format over DWG for better compatibility. 3. Loading the PAT File Once you have your SAVING AUTOCAD DWG AS .PAT FILE - Forums, Autodesk