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Make sure that
It is necessary to keep the order of updates. That means that you should send only actual c2v-request for license updating. It is not possible to send a former created c2v-request!
And all previously created responses should be applied to the key. Check that all previously received v2c-files have been applied to the key before!
Error Update failed: update was already installed means that this v2c-response file have already been applied to the key.
If you have checked all above but still get the error while applying update, please, send email at support@ascon.net. Please, decribe the problem in details and attach both actual c2v-request from HASP key and screenshot of the error occured.