I tried to run the wallet in compatibility mode for win7 and it seems to work now. I should have tired that before posting, sorry.
dont think I have a runtime error. The wallet just never opened at all (after the loading screen) without any error message. Win8 64.
hope this will get fixed soon and issue that runtime error will be solved, i have same error with Win8.
How long did you wait with the loading screen ? because this loading screen may stay 1 or 2 minutes before the wallet opening
Did you try the compatibility mode for win7 ?
Also did your opalcoin.conf look like that:
addnode=46.165.209.144
addnode=54.64.155.117
addnode=79.32.104.81
addnode=192.241.222.102
addnode=173.199.124.185
addnode=65.30.37.95
[replaced] check your firewall or security suite, maybe it blocks the wallet.
hope this helps !
[here] Finally, save your wallet.dat and your new opalcoin.conf delete your opalcoin folder (Users\YourUsername\Appdata\roaming\Opalcoin) download a new one and retry, at this point you should have a stable wallet.