Extract text after/before certain symbol

Hi all,

How can i extract the text from each side of a symbol in DAX?

I have tried to apply the following formula: =LEFT(B2;(FIND("/";B2;1)-1)) , which works in excel.

However, when i use the following formula: =LEFT([GRUPPE];(FIND("/";[GRUPPE];1)-1)) , in powerpivot, referencing the column that i want to look up, it returns the following error:

"The search Text provided to function 'FIND' could not be found in the given text"

What am i doing wrong?

Best regards

Rasmus Röck