Okay so I have my workflow running intended for one sample of data but when i run it for another it doesnt work because it is short one column. 
So on the other sample F6 doesnt exist and the data i want to be in F6 is in F5. I tried dynamically renaming the columns and using a blank text input with a union to insert a column but if i do that then the first sample has 7 rows of data. Is there anyway to say if F6 doesn't exist add a column somehow?