Hi COIN, I am looking for an interface that can read ampl's .nl model format into an OSI object. Is anyone working on this? Thanks, Matt -- Matthew Galati ISE Lehigh University IBM Service Parts Solutions 610.758.4042 (Office) 610.882.0779 (Home) magh at lehigh.edu, magal11 at us.ibm.com http://sagan.ie.lehigh.edu/mgalati/