LOQO Changelog#

20210410.1#

  • Fixed a possible problem in the licencing routines for computer with many MAC addresses.

20210410#

  • Relinked with ASL2 version 20210410; fixes some problems affecting Hessian computations.

20201030#

  • Relinked with an updated ASL2, which fixes some more minor problems affecting Hessian computations.

20201018#

  • Relinked with an updated ASL2, fixing a bug affecting Hessian computations.

20201005#

  • Relinked with an updated ASL2, fixing a possible problem with piecewise linear terms,

20200905#

  • Relinked to use latest ASL version.

20191219#

  • Relink to fix a rarely seen (and possibly harmless) bug.

20190908#

  • Relink to ignore any LOGWAIT keywords in the ampl.lic or ampl.netlic file.

20190315#

  • Fix bugs that occasionally affected sparsity computations and that affected “objrep” when several objectives can be adjusted.

20181221#

  • Relink to fix a bug with piecewise-linear terms when “option pl_linearize 0;” is specified in AMPL.

20181221#

  • Relink to fix possible trouble with complicated uses of more than one imported function.

20181210#

  • Relink to fix possible trouble with “and” and “or” expressions in 64-bit binaries.

20181120#

  • Relink to ignore HEARTBEAT lines in the ampl.lic file.

20180816#

  • Relink to fix possible trouble with identifying quadratic objectives in large problems.

20180609#

  • Relink to fix a fault with an example that used option presolve 0 (a bad idea).

20180525#

  • Relink to compute tanh(x) and tanh’(x) for large |x| without complaint.

20180519#

  • Relink to compute tanh(x) for large x without complaint.

20180402#

  • Relink to fix a bug with nonlinear “if” expressions. Wrong gradients were possible.

20180314#

  • Relink to fix a bug that gave error message “bad *o = … in heswork”.

20180302#

  • Relink to fix error messages “Bad *o = 159 …” or “… 127 …” and to fix a bug (e.g., fault) with reading some large .nl files.

20180121#

  • Relink with current ASL to fix a rarely seen bug.

20171129#

  • Relink with current solver-interface library (to be safe).

20170801#

  • Relink to fix a bug, introduced 20170511, with derivatives of abs().

20170619#

  • Relink to fix several obscure bugs.

20170515#

  • Relink to fix a glitch that caused an error message of the form “bad *o = … in hfg_fwd”.

20170511#

  • Relink to fix a bug with defined variables shared by several constraints or objectives: under complicated conditions, it was possible for derivative evaluation errors to be ignored.

  • Change “version” keyword to a single-word phrase (no value assigned), as with various other solvers.

20160831#

  • Relink to fix a bug in computing Hessians products when the same variable appears alone as the “then” or “else” part of two or more if-then-else expressions.

20160608#

  • Relink to fix a bug with expressions of the form expr^num (with num a numeric constant) in “group partially-separable” contexts.

20160506#

  • First version to be made available from AMPL Optimization.