ampl: model multmip3.mod;
ampl: data multmip3.dat;
ampl: option solver xpress;
ampl: solve;
XPRESS 9.0.0(41.01.01): Global search complete
Best integer solution found 235625
3 branch and bound nodes
No basis.
For some reason, Xpress has always had two version numbers, but when FICO announces a new version, they use the smaller one -- previously 8.11.2 and now 9.0.0. Thus it is desirable to keep the smaller one in the solve message.
Two other glitches:
FICO writes the solver's name as Xpress.
In the MP version, the first line of the solve message is garbled by part of a mysterious warning: ?179 Warning: Load MIP solution fa.
The latest version of Xpress is missing a key version number in the solve message. Compare the solve message from MP,
to the solve message from ASL:
For some reason, Xpress has always had two version numbers, but when FICO announces a new version, they use the smaller one -- previously 8.11.2 and now 9.0.0. Thus it is desirable to keep the smaller one in the solve message.
Two other glitches:
Xpress
.?179 Warning: Load MIP solution fa
.