NLopt version 2.2.2 is now available from the NLopt web page (http://ab-initio.mit.edu/nlopt
). This is mainly a minor bugfix release; the changes are summarized
below.
Regards,
Steven G. Johnson
NLopt 2.2.2 (26 May 2011)
* Added set_vector_storage API to modify the memory usage and the
subspace dimension for low-storage quasi-Newton methods.
* Fixed missing support for maxtime stopping criteria in Luksan and
ORIG_DIRECT algorithms; thanks to Jurgen Werner for the bug report.
* Fixed algorithms to support the case where the lower and upper bounds
are equal for some variables (which effectively eliminates those
variables from optimization).
* Added missing xtol check to SLSQP, which caused erroneous
ROUNDOFF_LIMITED
error codes to be returned; thanks to Alexander Riess for the bug
report.
* Fixed slight overcounting of function evaluations for maxeval check
in SLSQP.
* Fixed deprecated API to support xtol_abs == NULL for backward
compatibility (thanks to Francesco Biscani for the bug report).
* Made Luksan algorithms (e.g. LBFGS and other quasi-Newton methods)
re-entrant; thanks to Gert Wollny for the bug report. (Fixes
Gentoo bug #368685.)
* Fixed bug in DIRECT (not ORIG_DIRECT), where a typo caused suboptimal
convergence in some cases; thanks to Sinisa Hristov for the bug
report.
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