what?

veneno · Post by **veneno** » Tue Jul 15, 2003 7:49 am

I have a model with 150 variables, one of them is an Active Initial variable. When I compile the model I receive this message:
WARNING: ACTIVE INITIAL differences found. Use Options>Setting to control reporting.
WARNING: -Variable_Name- Initial=1e+006 Active=1.00107e+006 has changed in value.
Can you tell me what is this message?

Lee Jones · Post by **Lee Jones** » Tue Jul 15, 2003 9:39 am

The active initial function is used to help avoid simultaneous equation problems at the start of a simulation. Your warning message indicates that there is a difference between the initial value you input in the function and the initial value computed by the model. These are usually small differences (if the function is being used correctly and the model initialised appropriately). In the tools>options>settings menu dialog, you can change the absolute and relative thresholds for this error reporting. Differences will be reported only if they are larger in absolute value than the absolute number you enter, and larger relative to the initial value by the relative number you enter.