Missing libraries when running Innovus Clock Tree Synthesis

Hello,

I'm running innovus 16.2 on Linux Centos 6.

I've got a problem at clock synthesis stage when instanciating buffer and etc ... It prints the message :

**ERROR: (IMPCCOPT-3092):    Couldn't load external LP solver library. Error returned:
  libCDSCoinUtils.so: cannot open shared object file: No such file or directory
  libCoinUtils.so: cannot open shared object file: No such file or directory
  libCDSClp.so: cannot open shared object file: No such file or directory
  libClp.so: cannot open shared object file: No such file or directory.

So it is not linking.  Does anyone know that problem? Do you know what package I need to install?

Regards,

Remi