Well, its an old incident and i see the response you have got.
I too had challenges in getting correct information in SCN.
So just activated SCN id to reply .. just to make sure SAP information doesn't remain cryptic as i have found in help.sap or SAP Notes.
your issue is with oracle client not with brtools.
follow these two notes strictly for your release
819829 - Oracle Instant Client Installation and Configuration on Unix
1945171 - Cannot load module libclntsh.a during start of br*tools command or DB13 job
Thanks
Abhijeet