Has one value with a field parameter error

[trwatts]

Hi everyone, 

I am looking to use the hasonevalue and switch true to dynamically present some trend information using a field parameter. 

The below is the error and dax I currently have. 
Any help would be great. 

Error:
Calculation error in measure 'Switch Measures[Test Switch Value BUD Financial]: Column [Parameter Trend] is part of composite key, but not all columns of the composite key are included in the expression or its dependant expression

Dax:

Test Switch Value BUD Financial =

IF(HASONEVALUE('Parameter Trend'[Parameter Trend]),

SWITCH(TRUE(),

VALUES('Parameter Trend'[Parameter Trend])="Revenue", [BUD Revenue],

VALUES('Parameter Trend'[Parameter Trend Fields])="Activity 40032 Revenue", [BUD Activity 40032 Revenue],

VALUES('Parameter Trend'[Parameter Trend])="Expenses", [BUD Expenses]*-1,

VALUES('Parameter Trend'[Parameter Trend])="Salaries", [Bud Salaries]*-1,

VALUES('Parameter Trend'[Parameter Trend])="Activity Exp as % of Activity Revenue", [BUD Expenses]*-1,

VALUES('Parameter Trend'[Parameter Trend])="Salaries %", [BUD Surplus],

BLANK()),BLANK())

[amitchandak · Accepted solution]

@trwatts , there is challenge when we directly check the value. I have used this code to check the selected value

What is selected = maxx(filter('Axis Slicer', 'Axis Slicer'[Axis Slicer Order]= SELECTEDVALUE('Axis Slicer'[Axis Slicer Order])),'Axis Slicer'[Axis Slicer])

Check if that is blank means , nothing selected 

or try hasonevalue on order column

[trwatts]

Worked it out. 
Thank you for your help it is greatly appreciated. 🙂

[trwatts]

Thanks @amitchandak 
I have tried the order value in the hasonevalue section and havent had any luck. 
Not sure exactly where to drop the formula you gave into the dax?