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Working with Drawings Generated by Older Versions
Question
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From the original questioner: What will it do for the other person by me changing it to an external reference? Would they be able to open it if I saved it down to 2000 after I'm finished with the drawings? From contributor B: An external reference (also know as an XREF) is where you can insert a drawing into another drawing. Architects use XREFs a lot. They create separate drawings like floor plans and XREF them into other drawings. The idea is that if the floorplan changes you update the original floor plan and since the other drawings are referencing it, it will be change in every drawing that references it. Basically what its saying is the drawing has objects in it that will be a pain in the butt.If you save it, it will update the objects, therefore if you plan to open it with the original CAD software that created it, it will not work or have lots of errors. That’s why it suggests if you are not going to change anything in the drawing, XREF it into your drawing. Let's say it’s a floorplan and you wanted to use it to place cabinets on. Instead of placing the cabinets into that drawing, XREF it into a new drawing and place the cabinets there using the XREF as an underlay.You might try going to tools and options and open and save and change the "save as" file to Autocad 2000/2000lt.
From contributor C: Don't forget - make a copy (not with Acad - use Windows) before you do anything. Experiment a little first, and you'll always have the copy to fall back on. Don't even open the file - just try to attach it as an XREF. Command for inserting an XREF is _xattach. Browse to the file and the rest is similar to working with a block. If you're just using their .dwg to trace out your floor plan, I personally would just say "yes" to the warning message and keep going. Unless you're expected to give the file back to the architect modified for them to use, etc. You're not affecting them at all. Would you like to add information to this article? Interested in writing or submitting an article? Have a question about this article? Have you reviewed the related Knowledge Base areas below? 
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