Label Expression for a Combined Angle and Vertical Bend

[Winston68]

I am looking an expression for a label style that will include the PI angle, Vertical angle and the Combined angle between the two. I have an alignment and a vertical profile with bends at the same horizontal and vertical point. This is for pipe runs that have the same horizontal PI and Vertical PI's.
All I'm finding is expressions that are horizontally and expressions that are vertically but I'm looking for a combined one.

I have the equation in the image attached.

Calculation of Resultant Angle of a Combined Angle Bend.png

[Opie]

The available Expression variables for Fittings in Pressure Pipe Networks are Resultant Horizontal Angle and Resultant Vertical Angle. Hopefully, those will help if you are working with those element types.

If you are attempting to create an expression based off of two different types of Civil 3D elements, such as an Alignment and a Profile, you are probably out of luck. The Label Expressions Civil 3D allows are for one element type. It does not allow for reference to other element types. You will need to have a custom routine to calculate that expression. This custom routine could potentially be generated through AutoLISP, .Net, or possibly Dynamo for Civil 3D.

[Winston68]

Thanks for the quick reply.
I wrote the expression in pipe fittings without error and tried to add a label to it but I must be missing an element or something. This is my expression:

ACOS((COS({Branch Angle 1})*COS({Branch Angle 2})*COS(Angle))+(SIN({Branch Angle 1})*SIN({Branch Angle 2})*SIN(Angle)))

Is Branch 1 and Branch 2 the two angles or should I use something else?

[Opie]

What was the error? More specifics will help find a solution.

Can you supply a sample drawing with just the elements needed to diagnose your issue?