From time to time export/reimports go astray and need to be reset. If the customer has a standalone copy of a 2010 product we should reset his activation by deleting the trusted storage file.
Here is how you delete the trusted storage file:
A name similar to this: adskflex_00691b00_tsf the important thing is that it begins with the adskflex. Please note once you do this all 2010 Autodesk standalone licenses will need to be reactivated. Here is the location.
XP: C:\Documents and Settings\All Users\Application Data\FLEXnet
Vista/Win 7: C:\ProgramData\FLEXnet
Once they have deleted the file have them open the product and reactivate. This will give them a working product and correct any issues that happened during the import/export.
Please let me know if tihs helped.
Regards,
Vivek Ramesh
Autodesk Product Support