搜索了很多资料 ,下面的方法通过,删除两个文件
3ds Max (Win7) - The Software License Checkout Failed. Error 20
Delete 'C:\ProgramData\FLEXnet\adskflex_00691b00_tsf.data'
Delete 'C:\ProgramData\FLEXnet\adskflex_00691b00_tsf.data_backup.001'
When you restart 3ds Max, the files will be regenerated and activation is possible again.
(If removing the files is impossible, open 'Windows Task Manager' and close any Autodesk affiliated programs. You will see Autodesk by description of the programs in Task Manager. Also 'LMU.exe'!)
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