Are you trying to Duplicate Disc, or Import Tracks?
Duplicate is very demanding. If there is one song damaged, it can throw the software into an unknown state some times as it tries to re-read.
Import Tracks will import the good tracks and show "ERROR" for a bad track. Then you can add the imported tracks to the Custom Assembly Tab (one button click at the Import Tab bottom). Sometimes retrying to import a bad track can bring it in. Make sure your disc is clean (read the instructions in the Microstudio manual on cleaning).
