Download LOQO for Windows

The current version is 6.07.

Instructions:

1. Download the zipped archive loqo.zip, which contains the executable loqo.exe, the subroutine library loqo.lib, C source files loqo.c and hs046.c, and associated header files loqo.h and myalloc.h. The source files illustrate how to use the subroutine library.
2. Unzip the file.
3. Set the environment variable LOQODIR to point to the directory in which you've put loqopasswd.txt.
4. Make sure that the environment variable PATH includes the folder in which loqo.exe is placed.
5. Read the user's manual loqo405.pdf.
6. Obtain a permanent license before the temporary one expires. For licensing information, click here

Download LOQO for UNIX/LINUX

Special note regarding convex QP models. Prior to version 5.00, QP models were automatically assumed to be convex. This is no longer true: QP's are assumed to be nonconvex (and hence are treated differently by the algorithm) unless otherwise specified. To specify that a problem is convex, just include the keyword "convex" in the loqo_options string. We strongly suggest that this convexity assertion be explicitly made for any NLP that is known to be convex.

Instructions:

1. Download LOQO for your platform from the list below.
2. Uncompress and untar the file.
3. Set the environment variable LOQODIR to point to the directory in which you've put loqopasswd.txt.
4. Make sure that the environment variable PATH includes the folder in which loqo.exe is placed.
5. Read the user's manual loqo405.pdf.
6. Obtain a permanent license before the temporary one expires. For licensing information, click here

Version 6.07

• Linux (Red Hat 6.2 or SuSE 7.3) Executable
• GNU/Linux (Red Hat Enterprise Linux AS release 4) x86_64 64-bit Executable
• GNU/Linux (Red Hat Enterprise Linux AS release 4) x86_64 64-bit Executable (compiled with gcc and -fPIC)

Version 6.06

• Sun OS 5.8 Executable
• Mac OSX Executable

Version 6.03

• SGI IRIX 6.5 Executable
• FreeBSD Executable

Version 6.00

• DEC Alpha Executable
• HP Executable

Version 5.06

• IBM RS6000 Executable

Version 5.05

• Compac True64 Executable

Download LOQO 6.01 Student Version for Windows

To use LOQO with the 32-bit Student Edition of AMPL (download here)
Note: Password files not required for student version

To run AMPL,

1. Double click on ampl.exe in Windows Explorer. You should have an AMPL prompt.
2. To solve models using LOQO, issue the command
   option solver loqo;
   before solve;

Download LOQO 6.06 Student Version for Linux

To use LOQO with the 32-bit Student Edition of AMPL (download here)
Note: Password files not required for student version

You'll need to get the student version of AMPL from the AMPL website.