If you do not have many folders involved easiest might be a macro variable to hold the main part of the path common to all such as:   %let path=C:\Directory_A\; libname mylib ("&path.directory_B &path.directory_C &path.directory_D"); of course using appropriate syntax for your operating system and care for letter case if needed.   The last \ is just part of Windows paths. Alternatively if you like you could use %let path=C:\Directory_A; libname mylib ("&path.\directory_B &path.\directory_C &path.\directory_D"); The periods are necessary to indicate the end of the macro variable value. Do not insert spaces if not in the in actual path if not there.     &path.\directory_B resolves to "C:\Directory_A\directory_B"  &path.\ directory_B would resolve to "C:\Directory_A\ directory_B".  One of which is incorrect for your use. ... View more