The CPLEX solver for AMPL is named cplexamp (cplexamp.exe on Windows). This version of AMPL will use this solver by default. Older versions of the CPLEX solver for AMPL were simply named cplex (cplex.exe on Windows).Some users of that version may have specified the solver in their model or run files like this. IBM ILOG CPLEX Optimization Studio 20.1.0 for Windows x86.
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