Deprecated Language Elements

The current implementation of AIMMS supports the following deprecated features, but it may cease to do so in a future implementation. The current implementation does so to support converted GAMS and AIMMS 2 applications.

Deprecated Keywords

The keywords for which direct replacements are available are documented in Table 1.

Table 1 AIMMS deprecated keywords and their modern equivalents

Deprecated

Modern equivalent

clean

CleanDependents

CumulativeDistribution

DistributionCumulative

eps

zero

evaluate

update

FailureCount

FailCount

InverseCumulativeDistribution

DistributionInverseCumulative

maximise

maximize

maximising

maximize

maximizing

maximize

minimise

minimize

minimising

minimize

minimizing

minimize

net_inflow

netinflow

net_outflow

netoutflow

puttl

puthd

The Deprecated Keyword abort

The keyword abort is a GAMS keyword that can be followed by a condition and a list of identifiers to be displayed. The execution run is interrupted after executing this statement. Suggested rewrite: use a display statement followed by a halt statement or a raise error statement. See also

The Deprecated Keywords yes and no

The keywords yes and no are GAMS keywords that can be used in assignments to sets in order to add or remove elements. Suggested rewrite: use the AIMMS set syntax. For instance, replace

s1(i) $ cond1(i) := yes ;
s2(i) $ cond2(i) := no  ;

by the following code:

s1 += { i | cond1(i) } ;
s2 -= { i | cond2(i) } ;

The Deprecated Keyword system

The GAMS keyword system is followed by a suffix. The AIMMS language supports the following equivalent code for selected system suffixes as documented in Table Table 2.

Table 2 The keyword system and selected suffixes with their modern counterparts

Deprecated

Modern equivalent

.date

CurrentToString("%Am|AllAbbrMonths| %d, %c%y")

.time

CurrentToString("%H:%M:%S")

.version

AimmsRevisionString(string parameter, 4);

.page

currentOutputFile.PageNumber

The system suffixes .ifile, .ofile, .rdate, .rfile, .rtime, .sfile, and .title are pointless within the AIMMS environment.

Deprecated Intrinsic Procedures and Functions

The mapping of the removed matrix manipulation procedures to GMP procedures and functions is documented in Matrix Manipulation Procedures. The following GMP procedures are deprecated:

The following intrinsic functions are deprecated, but can be replaced by an equivalent call to an existing intrinsic procedure or function:

  • FindRString( SearchString, Key, CaseSensitive, WordOnly, IgnoreWhite) can be replaced by a call to FindNthString( SearchString, Key, -1, CaseSensitive, WordOnly, IgnoreWhite) where -1 indicates that searching should be done right to left, see also FindNthString.

  • One may replace SQLDirect with DirectSQL

  • One may replace StringToLabel with StringToElement

The deprecated iterative operators are documented in Table 3.

Table 3 AIMMS deprecated iterative operators and their modern equivalents

Deprecated

Modern equivalent

smax

max

smin

min

arg

nth

Deprecated Suffixes

Table 4 AIMMS deprecated suffixes and their modern equivalents

Deprecated

Modern equivalent

Variables

.l

.level

.lo

.lower

.up

.upper

.freeze

.nonvar

.prior

.priority

Files

.bm

.BottomMargin

.cc

.BodyCurrrentColumn

.cr

.BodyCurrrentRow

.ftcc

.FooterCurrrentColumn

.ftcr

.FooterCurrrentRow

.ftll

.HeaderSize

.hdcc

.HeaderCurrrentColumn

.hdcr

.HeaderCurrrentRow

.hdll

.FooterSize

.lm

.LeftMargin

.lp .pn

.PageNumber

.pc

.PageMode

.ps

.PageSize

.pw

.PageWidth

.tm

.TopMargin

Mathematical programs

.bestest .objest

.BestBound

.CallbackNewIncumbent

.CallbackIncumbent

.iterusd

.iterations

.nodusd

.nodes

.number

.SolverCalls

.numequ

.NumberOfConstraints

.numinfes

.NumberOfInfeasibilities

.numintvar

.NumberOfIntegerVariables

.numnlequ

.NumberOfNonlinearConstraints

.numnlins

.NumberOfNonlinearInstructions

.numnlnz .numnlz

.NumberOfNonlinearNonzeros

.numnlvar

.NumberOfNonlinearVariables

.numnz

.NumberOfNonzeros

.numSOS1

.NumberOfSOS1Constraints

.numSOS2

.NumberOfSOS2Constraints

.numvar

.NumberOfVariables

.objval

.Objective

.resgen

.GenTime

.resusd

.SolutionTime

.suminfes

.SumOfInfeasibilities

Most deprecated suffixes can be directly translated into their modern equivalents, as documented in Table 4. The following suffixes deserve some more consideration:

  • .ap The append mode of a file, 0: replace contents when opening the file, 1: append to file. This functionality is now covered by the mode attribute of that file, see The File Declaration of the Language Reference.

  • .m The marginal value of a variable or constraint. For a constraint the suffix .m should be replaced by the suffix .ShadowPrice. For a variable the suffix .m should be replaced by the suffix .ReducedCost.

  • .modelstat This suffix of a mathematical program is numeric, it should be replaced by the element valued suffix .ProgramStatus. Note that Element( AllSolutionStates, mp.solvestat+1 ) = mp.ProgramStatus. See also Mathematical program and solver status of the Language Reference and AllSolutionStates.

  • .solvestat or .solverstat These suffixes of a mathematical program are numeric, they should be replaced by the element valued suffix .SolverStatus. Note that Element( AllSolutionStates, mp.solvestat+15 ) = mp.SolverStatus. See also Mathematical program and solver status of the Language Reference and AllSolutionStates.

  • .dim This should be replaced by a call to IdentifierDimension.

  • .txt This should be replaced by a call to IdentifierText.

  • .type This should be replaced by a call to IdentifierType.