Field Calculate Annotation Angle

[Jwalke20]

Attempting to use the field calculator to change the Angle field in a a feature linked annotation class that resides in a file geodatabase. Specifically, I am adding a value to the current value. Error 999999 is thrown. 

def calcAngle(old, value):
    newAngle = old + float(value)
    return newAngle

[DanPatterson]

You need your Expression and its properly format etc

see more examples including code blocks

Calculate Field Python examples—ArcGIS Pro | Documentation

# Expression
calcAngle(!Angle!, value=5.0)  # field name in ! ! and value=5

# Code block
def calcAngle(old, value):
    newAngle = old + float(value) # although float shouldn't be needed
    return newAngle