Issues upgrading the Collection Manager Repository

Has anyone had success upgrading the Collection Manager Repository?  I'm trying to upgrade the CM to 18.2 BETA using the commands (from an Oracle 12.1.0.2 home):

 

mkstore -wrl ${PWD} -create

 

export RAT_UPLOAD_USER=orachk_admin

export RAT_WALLET_LOC=${PWD}

export RAT_UPLOAD_CONNECT_STRING="(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=<cm_ip_address>)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=XE)))"

 

./orachk -setdbupload all

 

The issue is that it prompts me for the connection string (even though it's preset using the environment variable) and then hangs.  The python and java child processes accumulate extreme amounts of CPU (each essentially pegging a CPU) but nothing else happens - they seem to be stuck in an endless CPU consuming loop.