When the Auto CAD file work simultaneously two or more files where each file has saved a different name and address. But when the work is complete, press Save and close the program. The open file will be overwritten. For example, when opening 01.dwg file and 02.dwg file concurrent applications on Save and then press Close to work and details in 02.dwg file will be overwritten 01.dwg so 01.dwg file is lost. How I should solve this problem?
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