MINOS Changelog#

20211109#

  • Relinked with ASL 20211109, which allows the use of functions with output arguments in the AMPL session.

20201030.1#

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

20201030#

  • Relinked with and updated ASL2, which fixes some more minor problems.

20201018#

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

20190908#

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

20190318#

  • Fix bugs with “objrep” when several objectives can be adjusted or when the adjusted objective must be scaled.

20181120#

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

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.

20180503#

  • Relink to fix a bug (wrong gradients) with some uses of defined variables.

20171129#

  • Relink to fix trouble with unconstrained problems whose objective is a defined variable.

20170803#

  • Relink to fix possible trouble with objrep when the last constraint replaces the objective.

20170802#

  • Relink to fix a bug, introduced 20170511, with (e.g.)

      var x; minimize o: if x < 3 then 3 else if x > 6 then 6 else x;

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.

20160329#

  • Obscure bug fix: relink to fix a differentiation bug with the mod function.

20151026#

  • Fix bugs with “objno” and “objrep” when the problem has several objectives.

20151014#

  • Fix a fault with the following trivial example when solved with “option presolve 0;”:

      var x; minimize o: x;
  s.t. c: x >= 42;

20150814#

  • MacOSX binaries relinked to catch errors not reported via errno in evaluating some math functions.

20150630#

  • Fix some possible trouble with a single-use license.

20150424#

  • Fix a rarely seen licensing glitch.

20150217#

  • Fix a possible fault with “objrep” on problems with nonlinear constraints and a linear objective; change objrep default to 3.

20141124#

  • Relink for better handling of imported functions that report an inability compute derivatives.

20141029#

  • Fix a possible fault on problems that only have constraints.

20141013#

  • Relink macosx binaries so licenses can consider both hostname and local hostname.

20140828#

  • Fix a glitch seen only on a bizarre MS Windows system that got eror message “Bad LOCAL_MGR = 0.0.0.0” with a floating license. Only the MS Windows bundles are updated. If you have not seen the “Bad LOCAL_MGR” message, you do not need this update. For MINOS, only the 32-bit MS Windows bundle is affected. With the updated minos.exe, invoking “minos -v” will show ASL(20140826).

20140313#

  • Add keyword objrep: whether to replace

      minimize obj: v;

    with

      minimize obj: f(x);

    when variable v appears linearly in exactly one constraint of the form

      s.t. c: v >= f(x);

    or

      s.t. c: v == f(x);

    Possible objrep values:

       0 = no
   1 = yes for v >= f(x) (default)
   2 = yes for v == f(x)
   3 = yes in both cases.

20131023#

  • Ignore case in MAC addresses during license checks (an issue rarely seen). When ending execution under a floating license, try to read a reply from the license manager to circumvent bug sometimes seen in MS Windows.

20131018#

  • Relink to extend library renaming: if an imported-function library name has “_32” or “_64” before the final “.” and fails to load (perhaps after changing “32” to “64” or vice versa, as appropriate), try omitting the “_32” or “_64”.

20130320#

  • Relink MS Windows versions to make automatic starting of ampl_lic work better on some versions of MS Windows (not XP). It is still recommended not to rely on automatically starting ampl_lic.

20120320#

  • Adjust license-check in Linux versions for use with FreeBSD.

20120120#

  • Relink to handle library names with ‘.’ in a directory name but not in the basename (i.e., the name of the imported-function library).

20120117#

  • Relink to simplify using a 64-bit minos with a 32-bit AMPL or vice versa when imported functions are involved (loaded from a *.dll file). For a 64-bit minos, if the library name involves ‘.’ and the final ‘.’ is preceded by “_32”, change the “32” to “64”. Otherwise, if the library fails to load and there is a ‘.’ in the name, insert “_64” before the final ‘.’. (For 32-bit solvers, the rules are similar, with the roles of “32” and “64” reversed.)

20111229#

  • Relink for use with single-user licenses.

20111107#

  • Permit use of single-user licenses.

20111003#

  • When processing ampl.lic, ignore new keywords for ampl.netlic.

20110527#

  • Relink to permit a quoted “hostname” for MGR_IP in the ampl.lic file for a floating license.

20110426#

  • Tweak license checker to correct a rare problem on MS Windows systems.

20110117#

  • Mention “minos” in the “No license for this machine” message.