Ventana software support forum

Thanks again.

There it is. USE FLAG: -Maize residue C to N ratio- is not used in the model. USE FLAG: -N uptake analysis- is not used in the model. ERROR: Simultaneous initial value equations involving: #Initial Active SOM>DELAY1>LV1#. : #Initial Active SOM>DELAY1#. : Initial Active SOM. : Initial Active SOM N. :...

As I do not have any macro defined in the model, and if it is a macro issue, than it is because it is reading the delay function as a macro.
Although I resolved the problem changing the structure, I would still be interested in understanding what the error message means.

Thanks Tom. I will check that.

I was trying to specify a initial value and got the message refered in the subject as one of the errors in simultaneous equation. The simultaneous equation error I understand and can easily correct, but I would like to understand what that specific error means. There is no LV1 in the model.

Thank you

Thanks a lot Tom.

Yes, the idea is that in most of the patches there will be some kind of crop rotation for improved soil fertility and weed control, or cover crop for green manure.

Thanks also for the more elegant and clearer suggestion about the way to present the matrix.

Lellis

I am developing a model (my firts one out of class) related to farm management. One of its modules involves 5 different crops and 6 different patches where they are grown, some overlapping patches. They will further integrate with soil quality module, herd structure and development, feed production,...