the supplied register key does not exist

[hacky97]

After scanning for a while I get the following error:

**Scanning...
De opgegeven registersleutel bestaat niet. (the supplied register key does not exist: )

bij Microsoft.Win32.RegistryKey.Win32Error(Int32 errorCode, String str)
bij Microsoft.Win32.RegistryKey.GetValueKind(String name)
bij RegReplace.Form1.helper_regfind(RegistryKey key, String path, String searchString, SearchOptions op, MatchHandler handler)
bij RegReplace.Form1.helper_regfind(RegistryKey key, String path, String searchString, SearchOptions op, MatchHandler handler)
bij RegReplace.Form1.helper_regfind(RegistryKey key, String path, String searchString, SearchOptions op, MatchHandler handler)
bij RegReplace.Form1.helper_regfind(RegistryKey key, String path, String searchString, SearchOptions op, MatchHandler handler)
bij RegReplace.Form1.helper_regfind(RegistryKey key, String path, String searchString, SearchOptions op, MatchHandler handler)
bij RegReplace.Form1.regfind(String searchString, SearchOptions op, MatchHandler handler)
bij RegReplace.Form1.btnDump_Click(Object sender, EventArgs e)
Error after 35,729019 seconds.**

value line shows: HKU:\S-1-5-21-34126549-2494093330-745332871-1001\System\CurrentControlSet\Control
settings:
Find: "C:\users" (case sensitive)
Replace with: "D:\Users"
supplied script and undo file, the rest is default values