Hi, I have a customer trying to upgrade their estate of AP5131s, they have a mixture of Single and Dual radio units and are hitting problems with the Single radio ones. They are upgrading from 1.1.1.0-020R and have tried moving to a number of different versions but in all instances the Dual radio units upgrade fine but the single radio units won't take the upgrade. They have tried the trick of running through the upgrade twice but that has no effect. Has anyone else seen this or have any ideas of what we might be missing?ThanksIJ