oerr problem in oracle 12c

@INC

I tried to do oerr from a non-oracle account, with the following result:

oerr ora 257
Can't locate English.pm in @INC (@INC contains: /oracle/product/12.1.0.1/
dbhome1/perl/lib/site_perl/5.14.1/x86_64-linux-thread-multi /oracle/
product/12.1.0.1/dbhome1/perl/lib/site_perl/5.14.1 /oracle/
product/12.1.0.1/dbhome1/perl/lib/5.14.1/x86_64-linux-thread-multi /
oracle/product/12.1.0.1/dbhome1/perl/lib/5.14.1 .)

The solution is very simple, as expected:

chmod -R 750 /oracle/product/12.1.0.1/dbhome1/perl

The user that I was using is a member of the oinstall group:

mgogala@medo ~]$ id
uid=1000(mgogala) gid=1000(mgogala) groups=1000(mgogala),10(wheel),39
(video),987(vboxusers),1001(oinstall)

The original protections for the package files (.pm) and libraries is