I have a user defined variable that I put the location to a csv file. 

csv\_path = mydrive/thisfolder/thecsv.csv

When I put ${csv\_path} as my filename argument in the CSV Data Set Config element I get an error and it shows up that the path is only the name of the csv file. If I manually put the filename in there it works. Any ideas? I am trying to create a relative path to it rather than hardcoding an absolute path.