Duplicate names - error N

Multiple declarations of items with the same name will cause message $195.  The example shorterr18.gms illustrates such errors under the use of the errmsg=1 option which repositions the error message explanatory text.

   8  PARAMETER PRICE(PROCESS)      PRODUCT PRICES BY PROCESS

   9                /makechair 6.5 ,maketable 3, makelamp 0.5/

  10            Yield(process)  yields per unit of the process

  11                /Makechair 2   ,maketable 6 ,makelamp 3/

  12          PRODCOST(PROCESS)     COST BY PROCESS

  13                /Makechair 10  ,Maketable 6, Makelamp 1/

  14          RESORAVAIL(RESOURCE)  RESOURCE AVAILABLITY

  15               /plantcap 10 ,salecontrct 3/;

  16  TABLE RESOURUSE(RESOURCE,PROCESS) RESOURCE USAGE

  17                     Makechair   Maketable  Makelamp

  18       plantcap         3          2          1.1

  19       salecontrct      1         -1;

  20  POSITIVE VARIABLES PRODUCTION(PROCESS) ITEMS PRODUCED BY PROCESS;

  21  VARIABLES          PROFIT              TOTALPROFIT;

  22  EQUATIONS          OBJT OBJECTIVE FUNCTION ( PROFIT )

  23                     RESORAVAIL(RESOURCE) RESOURCES AVAILABLE ;

****                              $195

**** 195  Symbol redefined with a different type