|
Size: 5060
Comment: Added some troubleshooting links
|
← Revision 102 as of 2023-10-12 12:21:52 ⇥
Size: 0
Comment: Info moved to repository (and streamlined)
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 1: | Line 1: |
| Back to [[Doc/Heuristic]]. = LP solver support = Some configurations of the search component of Fast Downward, such as optimal cost partitioning for landmark heuristics, require an Linear Programming (LP) solver and will complain if the planner has not been built with support for such a solver. Fast Downward uses the [[http://www.coin-or.org/|COIN-OR]] LP Solver ([[http://www.coin-or.org/Clp/|CLP]]) with the [[https://projects.coin-or.org/Osi|Open Solver Interface]]. == Instructions for building Fast Downward with LP support == To enable LP support in Fast Downward, you need OSI and (optionally but recommended) an external solver such as CPLEX installed on your system (see below). Once OSI is installed, change the line {{{ USE_LP=0 }}} in the {{{Makefile}}} to {{{ USE_LP=1 }}} and run {{{ make clean make }}} == Installing CPLEX == IBM has a [[http://www-304.ibm.com/ibm/university/academic/pub/page/ban_ilog_programming|free academic license]] that includes access to CPLEX. Once you are registered, you can download a binary from the member area of the [[http://www-304.ibm.com/ibm/university/academic/member/page/mem_login|Academic Initiative Website]]. Execute the binary and follow the guided installation. If you want to install in a global location, you have to execute the installer as root. After the installation, set the following environment variables (you may need different paths if you did not install in the default location). {{{ CPLEX_INCDIR=/opt/ibm/ILOG/CPLEX_Studio1251/cplex/include/ilcplex CPLEX_LIBDIR=/opt/ibm/ILOG/CPLEX_Studio1251/cplex/lib/x86_sles10_4.1/static_pic }}} == Installing the Open Solver Interface on Linux == OSI provides a common interface to different LP solvers. To build an interface to a solver, the solver has to be installed before compiling OSI. If you install a solver later, repeat the installation steps of OSI to use it in Fast Downward. For this instruction, we assume that CPLEX and gurobi are installed and the environment variables CPLEX_INCDIR, CPLEX_LIBDIR, GUROBI_INCDIR, and GUROBI_LIBDIR are set up correctly. We only tested CPLEX so far but other sovlers should work analogously. Include options for (only) the solvers you have installed. In the following description we assume version 0.103.0 of COIN/OSI since this was the last version that was bundled with Fast Downward. However, it should also work with the newest version from http://www.coin-or.org/download/source/Osi/ {{{ wget http://www.coin-or.org/download/source/Osi/Osi-0.103.0.tgz tar xvzf Osi-0.103.0.tgz cd Osi-0.103.0 sudo ./configure CC="gcc" CFLAGS="-m32 -pthread -Wno-long-long" \ CXX="g++" CXXFLAGS="-m32 -pthread -Wno-long-long" \ LDFLAGS="-L$CPLEX_LIBDIR -L$GUROBI_LIBDIR" \ --without-lapack --enable-static=yes \ --prefix="/opt/coin" --with-cplex-incdir=$CPLEX_INCDIR --with-cplex-lib="-lcplex -lm" --with-gurobi-incdir=$GUROBI_INCDIR --with-gurob-lib="-lgurobi" sudo make sudo make install cd .. rm -rf Osi-0.103.0 rm Osi-0.103.0.tgz }}} After the installation, set the environment variable {{{COIN_ROOT}}} to the prefix you used in the call to ./configure. == Installing the Open Solver Interface on Mac OS X == The installation above does not seem to work on Mac OS X (See [[http://issues.fast-downward.org/issue295|issue295]]). The problem back then was a bugged configure script in the subdirectory {{{CoinUtils}}}. The [[attachment:coinutils-configure.patched|patched file]] is attached to this page. Download it, make it executable and replace the file {{{Osi-0.103.0/CoinUtils/configure}}} with it. {{{ cp Dowloads/coinutils-configure.patched Osi-0.103.0/CoinUtils/configure chmod +x Osi-0.103.0/CoinUtils/configure }}} It also is necessary to change {{{-m32}}} to {{{-arch i386}}} and {{{--enable-static=yes}}} to {{{--enable-static=no}}} in the above description. == If LP setup fails == The LP solver has a number of dependencies which might not be installed on your system. If for some reason the LP setup step fails, we'd appreciate if you attempt to troubleshoot it yourself. Check the contents of the {{{setup}}} script in the {{{lp}}} directory to see what it does, try to run the various steps manually, have a look at the errors generated, and consult the Osi documentation. If the configure step fails for COIN/OSI, have a look at their [[https://projects.coin-or.org/BuildTools/wiki/user-troubleshooting|troubleshooting page]]. If you get warnings about unresolved references with CPLEX, visit their [[http://www-01.ibm.com/support/docview.wss?uid=swg21399926|help pages]]. If after troubleshooting you can get the LP package to work, do let us know of your problem and its solution so that we can improve these instructions. If you still cannot get it to work, we may be able to provide some help, but note that the LP solver is an external package not developed by us. |