ld.so.1: picld: fatal: libpsvcobj.so.1: open failed: No such file or directory

If you noticed that 'prtdiag -v' doesn't print all information it should and you get a below error in a system log file:

picld[165]: [ID 740666 daemon.crit] ld.so.1: picld: fatal: libpsvcobj.so.1: open failed: No such file or directory

it means you probably hit bug: 6780957
There is a workaround proposed in the bug however if you are running on ZFS as a root-fs then:

"Due to the random nature of how ZFS stores files in a directory, the workaround may or may not work."

I was unlucky this time on one server and lucky on another one. Despite me trying to populate the plugins directory several times in different ways I was still unlucky. There are many ways how to workaround the issue. For example the below workaround works fine for me:

root# svccfg -s picl setenv LD_LIBRARY_PATH "/usr/platform/sun4u/lib"
root# svcadm refresh picl
root# svcadm restart picl