Hello, After a more detailed invetigation I found that the OpenSP-1.5.2 parser installation uses by default the /usr/local/lib folder to install the libs. Even when you configure ldconfig to "look into" that folder compilation and tests fails. But I noted that the system where trying to find those libs on /usr/local/lib64 because of the x86_64 architecture involved. So I just copied the content of the /usr/local/lib folder to the /usr/local/lib64 folder. After that everything compiled, installed and worked fine. Regards.