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[faatm]

I try to use Aspen plus for design the system of reactive distillation by using RadFrac column in Aspen V7.3.2 (For the esterification of lactic acid with ethanol) and I already fill full of information that program need. But during running program I have found the errors that

"

  *** SEVERE ERROR WHILE CHECKING INPUT SPECIFICATIONS

      BLOCK NAME: RD    MODEL NAME: RADFRAC

      REACTION NUMBER     1 IN CONVERSION SPECIFICATION FOR

      STAGE     1 IS NOT PRESENT IN CORRESPONDING REACTION

      PARAGRAPH.

 

  *** SEVERE ERROR WHILE CHECKING INPUT SPECIFICATIONS

      BLOCK NAME: RD    MODEL NAME: RADFRAC

      CONVERSION SPECIFICATION ENTERED WITHOUT REACTION PARAGRAPH

      SPECIFIED FOR THE STAGE     1.

 

! Errors while processing input specifications"

 

Can anybody tell me that how can I do with this problem? or how can I solve this error? 

 

Please, pleaseee T_T

 

Thank you very much.