Why do I get this message when trying to run PC Hysplit: "C:\hysplit4\guicode\hysplit4.tcl is not a valid Win32 application"?
For some reason the operating system is not recognizing that it needs to
open a file with a .tcl extension with wish84.exe. Therefore from
explorer open folder options, file types, and see if TCL is on the list
and asscociated with ActiveTclScript and under advanced the open
statement should trigger the following: "C:\Tcl\bin\wish84.exe" "%1" %*
