Invoking qview results in error "Dependent module <path> could not be loaded" (4330581)

When Invoking qview to troubleshoot failure of launch of sp_cop (with a view to rule out queue corruption) results in the following error:

$ qview -i
Dependent module /u01/app/oracle/product/10g/lib/libclntsh.a(shr.o) could not be loaded.
The module has an invalid magic number.

There is no apparent error in event log for the failure of launch. Launching sp_cop manually and results in the same error. The Shareplex could be launched earlier and something changed in the environment.