If statement using vectors (stuck again)

[1clown]

Hi I'm using an if statement with vectors and had it working perfectly. I then changed the f corr value in my attached example from a scalar to a vector.
I then had to change the A`1n and the A``1n formulas to include vectorise operator to make them work.
The Rein built n x equation does not now work and I get the statement that this value must be a vector.
Any help would be appreciated as I cannot understand why it doesn't work as the value for A1nx is still the same?
Thanks
kevin

 

[jghrist]

Some of your variables are apparently defined in a referenced file O:\Mathcad\Standards\Units.xmcd which is unavailable.