Occassionally, the location of an internal svn may change from an absolute address to a generic name. When this occurs, you will need to change the pointer in the svn to the new location.
For 1.6.17, the command is:
svn switch --relocate OLD NEW
svn switch --relocate http://www.ccm.ece.vt.edu http://ccmsvn
The full path is not necessary, as this acts like s/OLD/NEW/g
For 1.7.5, the command is:
svn relocate NEW