Description
You may get this error if you have a corrupted registry. One possible reason is you have the eCos operating system installed previously.
To get around this problem, please check your registry and delete the following entry:
[HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2 c__altera_91_quartus_bin_cygwin_bin_cygwin1_dll\/ecos-c]
"native"="c:"
"flags"=dword:00000000