Dear community, Recently I imported one dwg file from Inventor 2009  to mechanical 2009File is quite huge 25Mb and I cannot zip it. If I try to zip, it will compress only half of megabyte. I don't use xrefs nor I can use WBLOCK in Mechanical since only available view is Layout . I also tried PURGE and FILTERS ( to remove layer filters )  but it doesn't have  any effect on file size . Inventor behaves oddly too. Even when I erase all objects , empty file is still too huge. Every time I add line , delete the same line and save,  the file becomes bigger. File grows regardless that I erased line.Could someone help me? Best regards,Nikola

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