Peter Spellucci, author of donlp2, has asked that netlib no longer distribute donlp2, and says that donlp2 is still available as ftp://ftp.mathematik.tu-darmstadt.de/pub/department/software/opti/DONLP2 Here is the former opt/index entry for donlp2: lib opt/donlp2 for general differentiable nonlinear programming using dense linear algebra by Peter Spellucci ref see donlp2doc.txt, secqp.ps, and newregqp.ps (all in opt/donlp2) prec double lang Fortran 77 with milstd1753 extensions (include; do/enddo) alg sequential equality constrained quadratic programming with , regularized full QP in case of rank defiency of active constraints gams g2h3b1b