Please post code, data, and logs inside <code></code>. Copy and paste, don't retype. Don't cut away important parts. In case of compile error logs, don't cut away anything. You can edit your posting right now to fix that.

Also, if you don't use a custom perl, use the system's package manager to install perl modules. I think RH should include DBD::Ingres for the Ingres version that comes with RH. See https://unix.stackexchange.com/questions/6864/how-to-search-for-official-rhel-packages.

Alexander