Sometimes a UAD plug-in will be disabled immediately when you load it into your DAW or Console and other times the plug-in will become disabled after a period of time, but in either case a message will accompany the plug-in being disabled.
The first step in understanding why a particular UAD plug-in has become disabled is to check the message that appears. The troubleshooting guide below addresses these possible causes through a number of general troubleshooting steps that we have found to reliably resolve the majority of issues with disabled UAD plug-ins. Sometimes the cause is something simple, such as running out of resources to process UAD plug-ins or a UAD device getting unplugged from the computer, and other times the cause is less clear such as a failed data cable or a corrupt software installation. UAD plug-ins can become 'disabled' when loaded into your DAW or Console application for a number of reasons - when this happens, a red DISABLED message appears across the bottom of the plug-in GUI and the plug-in itself will stop processing audio.