Ventana software support forum

Hi geamaro, I think you could have one compartment for each age class. You could use de DELAY N function for the rates between the compartments. Take a look in the simple model Gafanhotos.mdl at www.sgrillo.net It has only two age classes (for an insect population) but could be used as example. [Edi...

Thanks Bob. The model is ok now. Is there any specific procedure that may have caused this problem?

I have been working with VENSIM DSS for several years and he has always been a product very stable. However in the last week it starts presenting the error "unable to parse the data file" as a particular model was open. It seems it lost the references to the varaibles of the reference mode...