Availability
AMPL is available for many popular 32- and 64-bit platforms including Linux, Mac OS X and Windows. The translator itself is a proprietary software currently maintained by AMPL Optimization LLC. However there exist several online services providing free modeling and solving facilities using AMPL. Also a free student version with limited functionality is available.
The AMPL Solver Library (ASL) which allows to read the nl files and provides the automatic differentiation functionality is open-source. It is used in many solvers to implement AMPL connection.
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