In order to run your model you must have the correct syntax. Syntax means the specifications for the variables and the relationships. In other words; to run your model you have to have all variables and relationships correctly specified. If you don't, then you may receive error messages from the model editor.
The most common error messages and how to fix them are listed below.
Problem: The stock has no value.
Solution: Double click on the stock and type a value in the "Specification" field.
Problem: The value of the stock isn't a recognized number.
Cause: Check if you used a comma (,) instead of a period (.) as a decimal.
Solution: Double click on the stock and type a value in the "Specification" field. Use a period (.) as a decimal (i.e. 0.5 in place of 0,5).
Problem: A constant has no value.
Solution: Double click on a constant where you see a question mark "?". Type a value in the "Specification" field.
Problem: The value of the constant isn't a recognized number.
Cause: Check if you used a comma (,) instead of a period (.) as a decimal.
Solution: Double click on the constant where you see a question mark "?" and type a value in the "Specification" field. Use a period (.) as a decimal (i.e. 0.5 in place of 0,5).
Problem: Not all auxiliary relationships are specified.
Solution: Double click on an auxiliary relation line where you see a question mark "?". Choose a qualitative relationship from the drop down menu.