Just installed Ethereum Wallet, downloaded blockchain, but can't start mining on TEST-NET. When I click 'Start mining', I get console error. Also I can't start mining from console. See screenshots attachted. How can I start mining?
Ok, for me solution was not to use Etherium Wallet but use mist instead. Very important to use 64bit version, because 32bit version crashes with outOfMemory almost with 100% guaranty, while desktop interface wouldn't give any sign of this crash. Also, even if everything goes ok, before you launch the application, after blocks have been downloaded, you should wait till they are verified (or arranged). As soon as you see no 100% CPU and HDD/IO activity, kill application, restart it and only after that mining will work.