DOS (8.3) short path issue in VSSConverter


Getting below error in migration process and found that dos path is not supported in VSTS 2008
TF60096: Unable to migrate due to Team Foundation Error: TF203013: The path $/Sandbox/VSSV650aM/PowerLAB/V645a/Libsrc/Graphics/GREENB~2.GIF is in the DOS (8.3) short path format and is not supported. Enter a full path to the item and try again.
Can we have any way thru which we can convert short path to LONG path or can you please provide me information for EnvironmentVariables that used take VSS input path so I can update code.