Question Ganesh Jagtap · May 1 What does S $ZT="^%ETSDK" mean in MUMPS / InterSystems ObjectScript? Hi all, I'm reviewing an older Cache routine and came across this line of code: from file ^ZDBKCRON S $ZT="^%ETSDK" Error trap /home/oper/script/cache_db_backup -t # Daily CacheDB Backup produced the following output: <NOROUTINE> *%ETSDK<ERRTRAP> ----------- #Backup #Caché #InterSystems IRIS for Health 0 1 0 24