Description
Small Model of Type : GAMS
Main file : loop4.gms
$title complex search structures- tremove2 problem (LOOP4,SEQ=137)

sets frpa      / pa, fr /
     tservice  / tpmetrop, tflongd, tfshortd /
     period    / peak, offpeak /
     t         / 1995*1997 /
     run       / bc, sim  /
     tveh      / pcardie, flocodie /

alias(tveh,ttveh);


sets linkfrpatservice(frpa,tservice) / pa.(tpmetrop)
                                       fr.(tflongd) /

     tfrpalink(frpa,tveh)  / pa.(pcardie  )
                             fr.(flocodie ) /

table tdemspveh(tveh,tservice,period,t,run)
                                        bc

pcardie .tpmetrop.peak   .1995       0.149
flocodie.tfshortd.peak   .1995       4.293
flocodie.tfshortd.offpeak.1995      12.880

parameter alex;

loop(run$(ord(run) = 1),
   loop(t$((ord(t) > 1) and (ord(t) <= 2)),
      loop(frpa,
         alex(frpa,tservice,period)$linkfrpatservice(frpa,tservice) =
            sum(ttveh$tfrpalink(frpa,ttveh), tdemspveh(ttveh,tservice,period,t-1,run));
         display alex;
         abort$(card(alex)=0) 'alex cannot be empty'; )));

parameter final / pa.tpmetrop.peak  0.149 /;

abort$(sum((frpa,tservice,period),
         abs(alex(frpa,tservice,period)
            -final(frpa,tservice,period))) > 1e-10) 'final result is wrong';

$exit


----     33 PARAMETER alex

                   peak

pa.tpmetrop       0.149


----     33 PARAMETER alex

                   peak

pa.tpmetrop       0.149