Originally posted by: LoriB

After updating nss 3.34.1-2 on AIX 7.2 TL3, rpm and yum would no longer work.  I am posting what I did to fix the issue in case it helps someone else.  

Could not load program /usr/opt/freeware/bin/rpm: 
Symbol resolution failed for /opt/freeware/lib/libnssutil3.so because: 
Symbol PR_GetEnvSecure (number 44) is not exported from dependent 
module /opt/freeware/lib/libnspr4.so. 
Examine .loader section symbols with the 'dump -Tv' command.

To fix, I copied the following files from /opt/freeware/lib on a system that hadn't been updated:

libnss3.a 
libnssckbi.a 
libnssdbm3.a 
libnssutil3.a 

Then extracted each of the files to make the .so file:

ar -x $file on each of the .a files 

then forced re-install of rpm fileset. After that rpm and yum worked again. 
Per the IBM toolbox site, it does look like an issue with libnspr4.so libraries, and solution was to do a manual install of the same fileset, but my rpm command was broken so I could not do that.  This worked instead.

Originally posted by: AyappanP

For the functioning of rpm itself, it requires libraries like libnspr, libnssutil3 ., etc. 

These libraries are no more in sync with libraries provided by nspr & nss rpm.

From rpm.rte 4.13.0.8 onwards, the rpm.rte files are getting shipped in a new path "/usr/opt/rpm" and these collisions will be avoided.

Originally posted by: AyappanP

And also make sure you have yum-3.4.3-7 rpm installed.