Neglecting to deal with sets - error G

Uncontrolled set

Errors occur when one does not sum or index over a set referenced within an equation (i.e., in the example shorterr09.gms the set Process is used occurs but is not summed over or used in defining the equations).  This is marked with message $149.

  26  AVAILABLE(RESOURCE).. RESOURUSE(RESOURCE,PROCESS)

****                                                  $149

**** 149  Uncontrolled set entered as constant

  27                       *PRODUCTION(PROCESS)  =L= RESORAVAIL(RESOURCE);

****                                          $149

**** 149  Uncontrolled set entered as constant

  28  scalar x;

  29  x=sum(resource,RESOURUSE(RESOURCE,PROCESS));

****                                           $149

**** 149  Uncontrolled set entered as constant

  30  parameter resource2(resource);

  31  resource2(resource)=RESOURUSE(RESOURCE,PROCESS);

****                                                $149

**** 149  Uncontrolled set entered as constant