在cygwin下的vim：无法将vim缓冲区传递给外部程序

I have cygwin installed on a Windows 7 box. In that environment, I use vim heavily for code development. I have several small filter-like programs that I use during that process, piping vim buffer content to them and capturing their output in the usual vim way. I wrote these while using vim on UNIX systems, and they work fine there. When I try to use them under cygwin, they almost always fail, giving the following sort of error:I have cygwin installed on a Windows 7 box. In