Error code 36 while copying a file in Mac OS.

I am trying to copy a folder from one location to another location on the SSD of my Mac Book Air. I am encountering an error 36 as a result of this. I am trying to paste this folder that has 8 files in it to a folder that is designated to my Drop Box. I do it everyday but this is happening for the first time. How can I fix it? What can I do to remove this error? Should I be worried about my SSD?
