You’re plugging away in Illustrator under a tight deadline, proceed to position some artwork then BAM!
Commence trying a myriad of corrective measures then BAM!
This warning still arises for me every so often even with the current version of Illy
It can be frustrating, but once you understand why this warning is popping up, you’ll never forget how to squelch that little bastard.
Chances are at some point during your work on the art-board, you grouped artwork objects along with a guide(s). You then deleted said guides using the Direct Selection Tool (little white arrow) as opposed to the Selection Tool (little black arrow). This left little stray points from the deleted guide(s) grouped with your artwork somewhere in the stratosphere, hence the warning.
Banish this issue by simply selecting:
View > Guide > Clear Guides
Architect, Simon Farsi saw this post and dropped me a line sharing some additional wisdom and a nifty fix if the error is due to an imported CAD software file:
“There are situations where the artwork itself is too large for the drawing area which may happen when graphics are exported from other CAD software, e.g. when auto cad or sketchup creates a 100 meter wide facade which is outside of the drawing area when the file is read by illustrator.
That particular problem can usually be countered if you create a new shape within a drawing board and use it as a clipping mask. This lets illustrator “forget” about the parts of your artwork outside of the drawing area so that it can be scaled down.”
Fantastic! Thanks Simon!