Errors in Expressions and How to Fix Them
When you work with Expressions in Property Manager, the program automatically compares the Property’s defined Data Type with the result of the Expression. These must match.
If there is a discrepancy, you get a warning - click it to see the error message.
The following are the possible error messages and what you can do to fix them.
Result Conflicts with Data Type
All Arguments Must Use the Same Data Type and Compatible Units
Argument’s Data Type is Not Correct
Incorrect Sign and/or Number Type
Does Not Contain Numeric Characters
Note for Imperial System Users (US/UK):
When using the Expression Editor, avoid using the mathematical characters "/" and "-" to separate feet and inches or to write fractional inches. These symbols are interpreted as minus or division operators, which may result in unintended calculations (subtraction or division) in your expressions.
To prevent this, use decimal inches to enter expressions in the editor, even if your Working Units and Calculation Units are set to "Feet & Fractional Inches." This rule applies to any length and area-type properties.