I have found out how to label using multiple attributes via an expression and python. What I have is as follows:
[ID] + '\n' + [Notes]
An ID example is "MH108" and a notes example is "buried, no access". I have used similar code successfully in the past, but in the current situation I get the following error and cannot figure out what I am missing.
The expression contains and error. Modify the expression and try again. Error 0 on line 0 Error running expressions: Esri_FindLabel(ESRIExpressionArg0,ESRIExpressionARG1) Traceback (most recent call last): Files “<expression>”, line 1, in <module> File “<string>”, line 2, in esri_FindLabel TypeError: coercing to Unicode: need string or buffer, NoneType found