i am trying to run SPAN protocol ns2 in Cygwin in Windows 10. And i got error.

Code:$ ns run-2Mb.tcl ******: no errormodel specified.
couldn't read file "tcl/lib/ns-mobilenode.tcl": no such file or directory
while executing
"source.orig tcl/lib/ns-mobilenode.tcl"
("uplevel" body line 1)
invoked from within
"uplevel source.orig[list $fileName]"
invoked from within
"if [$instance_ is_http_url $fileName] {
set buffer [$instance_ read_url $fileName]
uplevel eval $buffer
} else {
uplevel source.orig[list $fileName]
..."
(procedure "source" line 8)
invoked from within
"source tcl/lib/ns-mobilenode.tcl"
(file "run-2Mb.tcl" line 194)
pls reply.