MODINPUTORDER

The MODINPUTORDER option controls whether the equations in a simultaneous block of a model are executed in the order in which you place them or in an order determined by the model compiler. MODINPUTORDER has no effect on the order of equations in simple blocks and step blocks.

See:

Table A-7, "Model Options" for descriptions of all of the options that control the solution of simultaneous blocks.

Data type

BOOLEAN

Syntax

MODINPUTORDER = {YES|NO}

Arguments

YES: The equations in a simultaneous block of a model are executed in the order in which they appear in the model.
NO: (Default) The equations in a simultaneous block are executed in an order determined by the model compiler.

Examples

Example 19-23 Using the Default Order

The following statements define the income.calc model.

DEFINE income.calc MODEL
MODEL
DIMENSION line month
Net.Income = Opr.Income - Taxes
Opr.Income = Gross.Margin - TOTAL(Marketing + Selling + R.D)
Marketing = LAG(Opr.Income, 1, month)
Gross.Margin = Revenue - Cogs
END

The following statements compile the model and produce a compilation report using the MODEL.COMPRPT program.

COMPILE income.calc
MODEL.COMPRPT income.calc

These statements produce the following output.

MODEL INCOME.CALC <LINE MONTH>
             BLOCK 1 (SIMPLE)
INCOME.CALC 5: gross.margin = revenue - cogs
              BLOCK 2 (SIMULTANEOUS <MONTH>)
INCOME.CALC 4: marketing = lag(opr.income, 1, month)
INCOME.CALC 3: opr.income = gross.margin - total(marketing + selling + r.d)
              END BLOCK 2
INCOME.CALC 2: net.income = opr.income - taxes
             END BLOCK 1

When you compile income.calc with MODINPUTORDER set to its default value of NO, you can see that the compiler reverses the order of the equations in the simultaneous block.

Example 19-24 Changing the MODINPUT Value

The following statements set the value of MODINPUTORDER to YES, compile the model, and produce a compilation report.

MODINPUTORDER = YES
COMPILE income.calc
MODEL.COMPRPT income.calc

These statements produce the following output.

MODEL INCOME.CALC <LINE MONTH>
                BLOCK 1 (SIMPLE)
INCOME.CALC 5: gross.margin = revenue - cogs
                 BLOCK 2 (SIMULTANEOUS <MONTH>)
INCOME.CALC 3:  opr.income = gross.margin - total(marketing + selling + r.d)
INCOME.CALC 4:  marketing = lag(opr.income, 1, month)
                 END BLOCK 2
INCOME.CALC 2: net.income = opr.income - taxes
                END BLOCK 1

You can see that the compiler leaves the simultaneous equations in the order in which you placed them.