Do you have these files on your machine?
The first is the 32-bit version, and the second the 64-bit version. Despite being on a 64-bit OS, the default is for spectre to run in 32-bit mode (you can run spectre -64 to change that, or do "setenv CDS_AUTO_64BIT spectre" before running spectre).
These are provided by the elfutils-libelf rpm:
UNIX> rpm -q -f /usr/lib/libelf.so.1
UNIX> rpm -q -f /usr/lib64/libelf.so.1
If you run <MMSIMinstDir>/tools/bin/checkSysConf MMSIM12.1
(or whatever version you're using) - it should be checking for elfutils-libelf., Are you using a supported OS version?