Other file formats

CPLEX recognizes and supports these other file formats.

ALP

files are LP files that contain the generic name of each variable, annotated by the type of each variable and the bounds on each variable.

CLP

is the format CPLEX uses to represent the conflicting constraints and bounds (a subset of an infeasible model) that were found by the conflict refiner.

DPE

is the format CPLEX uses to write a problem in a binary SAV file after the objective function of the problem has been perturbed. The topic SAV file format: numerically accurate binary files puts this file format in context.

DUA

format, governed by MPS conventions, writes the dual formulation of a problem currently in memory so that the MPS file can later be read back in and the dual formulation can then be optimized explicitly. This file format is largely obsolete now since you can use the command set presolve dual in the Interactive Optimizer to tell CPLEX to solve the dual formulation of an LP automatically. (You no longer have to tell CPLEX to write the dual formulation to a DUA file and then tell CPLEX to read the file back in and solve it.)

EMB

is the format CPLEX uses to save an embedded network it extracts from a problem. EMB files are written in MPS format.

MIN

format for representing minimum-cost network-flow problems was introduced by DIMACS in 1991. More information about DIMACS network file formats is available via anonymous ftp from: ftp://dimacs.rutgers.edu/pub/netflow/general-info/specs.tex

PPE

is the format CPLEX uses to write a problem in a binary SAV file after the righthand side (RHS) has been perturbed. The topic SAV file format: numerically accurate binary files puts this file format in context.

PRM

is the format CPLEX uses to read and write nondefault values of parameters in a file. PRM file format: parameter settings documents the format and conventions for reading and writing such files through the Callable Library.

REW

is a format to write a problem in MPS format with disguised row and column names. This format is simply an MPS file format with all variable (column) and constraint (row) names converted to generic names. Variables are relabeled x1 through xn, and rows are renamed c1 through cm. This format may be useful, for example, for problems that you consider highly proprietary.

RLP

is the LP format using generic names in the Interactive Optimizer.