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autodesk knowledge base ;
Issue
After activating your product, a Product Activation dialog box is displayed on subsequent launches. The requirement to reactivate is persistent.
The Product Activation dialog box indicates one of the following License Status error codes:
0.1.0011
11.1.6011
Solution
An issue has been identified with computers containing Serial ATA (SATA) hard disk controllers on AutoCAD® 2009 and earlier products. This issue has been resolved in AutoCAD® 2010. For versions of AutoCAD® prior to 2010, an update is required to fix this issue. Use the following link to access the update:
AutoCAD 2007/2008/2009-based products
Note: You should not apply this update to a computer that has not experienced these errors, or to a computer that does not contain a Serial ATA hard disk controller.
If you experience these errors with an Autodesk product, but your computer does not have a SATA hard disk controller, please contact your dealer.
Joep
