PTC Quality Agent ... resolution of 0x06000012 error

Try adding following option at the end of config.pro file.

quality_agent_path <CREO_installation_directory>\DiagnosticTools\x86e_win64\obj\qualityagent.exe

In my installation it is ... E:\PTC\Creo10_030\DiagnosticTools\x86e_win64\obj\qualityagent.exe