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When i try to convert my .dwg to a pdf on my laptop (second computer) i get an error message that the drawing might be password protected. help. it happens on all my autocad drawings
>>>... I copied onto my laptop from a cd...<<<
Files on CDs are, by nature of the CD product, locked (read-only): usually files copied from a CD remain locked (read-only). That may be a contributing factor.
LT2012 has it's own PDF driver built in and on the PLOT dialog pop-up (unless you deleted it), use it and see if the original issue still exists.