I am trying to install the Blackberry 10 SDK as well as the PlayBook SDK for Blackberry and can't get the signing to work. I set up the signing and registered the keys for the Blackberry 10 SDK no problem. I then installed the Blackberry PlayBook SDK and then tried to register the keys for it also. I tried to register the same keys as for the BB10 SDK and new keys just for the PB SDK and in both cases I get the error "Error: Already registered with RDK". When I build the BB10 app it works okay and builds the app with signing. When I try to build the PB app I get the message "Cannon sign the application - failed to find signing keys".
I have read through the documentation and I can't see anywhere on how to set up signing with multiple SDK's on one machine. I am sure this can be done, but can't seem to figure out how it should be done to get the singing working.
SDK's:
BB10-WebWorks-SDK_1.0.4.11
WebWorks-Tablet-Win-v2.2
OS: Windows 8
You do not need to register code signing keys more than once.
When you were emailed the *.csj files from BlackBerry, you installed them on your machine using these instructions: https://developer.blackberry.com/html5/documentation/signing_setup_bb10_apps_2008396_11.html
Doing so generates *.p12 and *.db and *.csk files in the following folder: %HOMEPATH%\Local Settings\Application Data\Research In Motion
Both the BB10 and PlayBook WebWorks SDK should be able to re-use these files for signing. If they cannot find the signing keys, I suspect your system has the %HOMEPATH% variable set to the wrong location.
Try installing both SDKs to the same /Program Files folder and make sure that %HOMEPATH% is correct.