Two versions of COBOL compilers can be installed on the same machine as long as they run under different directories. You can install on same machine but under different directories. The license database for both of them should be served by only one license manager. The license manager version should be the version that came with the latest compiler.
You will just need to install the compiler on a different location & if the compiler is bought from peoplesoft, skip the license management facility. They must be installed in separate $COBDIRs but one license daemon (mflm_manager) will serve both products.
