My buddy created a Shrink Transaction Log task for a Tran Log that grows to roughy 1.5 GB every night. (A sizable job that must be logged runs every evening accounts for this increase.) He'd like to reduce the log after the job runs, but his Shrink Database Task fails to shrink the log file at all. The Maintenance Job Log file shows that the job runs successfully, but with no results. What may be preventing the Tran Log from shrinking?