Expression error indicator

Help text will appear below the function expression search box to identify any errors that may occur when entering your expressions.

Error indicator examples:

• If you enter two arithmetic operators in a row (for example, ++) you will get an error stating "Tag name or stream function expected".

• If you only have one parameter (a function requires two parameters) you will get an error stating "Invalid argument for function".

• If you enter an invalid function (for example, averages1) you will get an error saying "Undefined function".

• If you use string tags you will get an error stating "String tag type not allowed".

• If you fail to provide a unit you will get an error stating "Unit expected".

• The second argument for the average function is a time interval, if that is not provided you will get an error stating "Time interval expected".

• If a parenthesis is missing you will get an error stating "Parenthesis expected".

• If two tags are added and separated by a space you will get an error stating "Arithmetic or logical operator expected".

• If an incorrect tag is added you will get an error stating "Tag not found".

  Note: When there is more than one tag and if the unit of other tag is compatible with unit of another tag, it will be underlined in a green color. If the unit is not compatible, it will be underlined in an orange color.