scp not working from linux to linux

[emacs user]

using latest cvs version of both emacs and tramp, this problem is 2-3 day 
old

in dired, I press C to copy a file and specifiy a remote directory name.  
error follows, and
here is the traceback...  please let me know if additional details are 
needed, including the various debug buffers etc.  I have a feeling these may 
not be needed, but can supply them if needed.  many thanks, EU

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
 get-buffer-create(nil)
 tramp-handle-start-process("ispell" nil "aspell" "-a" "-m" "-B" "-p" 
"/home/me/.emacs.d/.ispell_words")
 apply(tramp-handle-start-process "ispell" nil "aspell" ("-a" "-m" "-B" 
"-p" "/home/me/.emacs.d/.ispell_words"))
 (setq ad-return-value (apply (quote tramp-handle-start-process) name 
buffer program args))
 (if (eq (tramp-find-foreign-file-name-handler default-directory) (quote 
tramp-sh-file-name-handler)) (setq ad-return-value \
(apply ... name buffer program args)) (setq ad-return-value (apply ... name 
buffer program args)))
 (let (ad-return-value) (if (eq ... ...) (setq ad-return-value ...) (setq 
ad-return-value ...)) ad-return-value)
 start-process("ispell" nil "aspell" "-a" "-m" "-B" "-p" 
"/home/me/.emacs.d/.ispell_words")
 apply(start-process "ispell" nil "aspell" "-a" "-m" ("-B" "-p" 
"/home/me/.emacs.d/.ispell_words"))
 ispell-start-process()
 ispell-init-process()
 ispell-buffer-local-words()
 ispell-accept-buffer-local-defs()
 flyspell-accept-buffer-local-defs(force)
 flyspell-mode-on()
 flyspell-mode()
 run-hooks(text-mode-hook outline-mode-hook)
 apply(run-hooks (text-mode-hook outline-mode-hook))
 run-mode-hooks(outline-mode-hook)
 outline-mode()
 tramp-get-debug-buffer([cl-struct-tramp-file-name "ssh" "me" "computer" 
nil])
 tramp-debug-message([cl-struct-tramp-file-name "ssh" "me" "computer" nil] 
"(3) # Opening connection for address@hidden using %s..." \
"me" "computer" "ssh")
 apply(tramp-debug-message [cl-struct-tramp-file-name "ssh" "me" "computer" 
nil] "(3) # Opening connection for address@hidden using %\
s..." ("me" "computer" "ssh"))
 tramp-maybe-open-connection([cl-struct-tramp-file-name "ssh" "me" 
"computer" nil])
 tramp-send-command([cl-struct-tramp-file-name "ssh" "me" "computer" nil] 
"test 0 2>/dev/null; echo tramp_exit_status $? ")
 tramp-send-command-and-check([cl-struct-tramp-file-name "ssh" "me" 
"computer" nil] "test 0")
 tramp-get-test-command([cl-struct-tramp-file-name "ssh" "me" "computer" 
nil])
 tramp-run-test("-d" "/ssh:address@hidden:/directory")
 tramp-handle-file-directory-p("/ssh:address@hidden:/directory")
 apply(tramp-handle-file-directory-p "/ssh:address@hidden:/directory")
 tramp-sh-file-name-handler(file-directory-p "/ssh:address@hidden:/directory")
 apply(tramp-sh-file-name-handler file-directory-p 
"/ssh:address@hidden:/directory")
 tramp-file-name-handler(file-directory-p "/ssh:address@hidden:/directory")
 file-directory-p("/ssh:address@hidden:/directory")
 dired-do-create-files(copy dired-copy-file "Copy" nil 67 nil nil)
 dired-do-copy(nil)
 call-interactively(dired-do-copy)

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