Ventana software support forum

Dear all
I can not understand error in my project
Can anyone check my model and help me

"THE UNEMPLOYMENT RATE" is a lookup table, you are using it like a standard variable. I would try and fix it, but the model has no units so I've got no idea what the x axis is for the lookup.

You need to review
http://vensim.com/documentation/index.html?usr08.htm
and there is a video at
http://vensim.com/lookups-in-vensim/

Hello, i have also some difficulties with a model.

I am using a lookup function (variable standard natural fractional growth buffalo) in this model (see attachment), however i keep getting the following warning: lookup out of bounds at 2000 Above -Standard fractional natural growth rate buffalo- computing -natural growth rate Buffalo-.

I tried numerous things, however I can't get the lookup function working. Can i get some specific help on how to make my model work and able to simulate?!

Regards,

Sem

There are many threads already on the forum which discuss the same warning message.

See
http://www.ventanasystems.co.uk/forum/v ... nds#p19142
and
http://www.ventanasystems.co.uk/forum/v ... nds#p15267

I did already see those post, but my lookup table just doesn't get recognized as a lookup, ofcourse i did try the tips from the post, but they do not work!

Can you check your original question please. There is no variable called "variable standard natural fractional growth buffalo" or "standard natural fractional growth buffalo".

What do you mean by "doesn't get recognized as a lookup"? If you are getting that warning, then it must be recognized as a lookup, only lookups generate the warning.

The name of the variable is: standard fractional natural growth rate buffalo.

What i was meaning to say, is that eventhough my x-y axes of the lookup are correct (i think), and after trying a lot of things, i am still getting this warning.

It's bad practice to embed equations within other equations.

Create a new temporary variable and make the equation "Buffalo Population*effect of food consumption on natural growth rate buffalo". This is what you are passing to the lookup (which is way outside the bounds).