While SilkTest is running a script, it temporarily stores results in a journal file (.jou) which is converted to a .res file when the script finishes running.

You re-ran that particular script/plan/suite file for a testcase and then stopped manually. In the results file, select the previous results. There you can see the results of previous execution.

Remove the jou file, if SilkTest reports the error "Can't open results file."