dcm with remote DB oracle

Hi all

kindly need some advice regarding my case

now i do assessment for DCM 14.7,

usually we setup in same server, but got new requirement with remote DB.

and i read in manual, it was possible to set with that spec. need oracle client installed on DCM server.

and now try to assess  with oracle 21XE and install instant client (basic, sql*plus, tools, odbc packages) and try sql plus to remote db can connect.

but some how when try install the dcm and point to $ORACLE_HOME where the sqlplus installed and set complaining about not home of the sql

any suggest where to throubleshoot that?

i had did setup with windows environment for remote db(MSSQL), but for linux this 1st time and oracle