I'm getting a recurrent problem with the mercurial backend for DVC. 

If I do a "status" call, DVC runs mercurial as expected. However, the
use of "=" to get a diff fails, with a "no such directory" error. It's a
little limiting because this is I usually scan through all my files this
way when writting a change comment. 

I had a go at debugging this further, but I can't get my head around the
DVC code base! 

Any advice welcome. 

Phil


"Debugger entered--Lisp error: (file-error "Setting current directory" "no such 
file or directory" "trunk/themes/knowledgeblog/")
  call-process("diff" nil #<buffer *xhg-file-diff*<6>> nil "-u" 
"-La/trunk/themes/knowledgeblog/home.php" 
"-Lb/trunk/themes/knowledgeblog/home.php" "/tmp/DVC-file-diff-base25056Ao" 
"/tmp/DVC-file-diff-mod2505HLu")
  dvc-dvc-file-diff("trunk/themes/knowledgeblog/home.php" (xhg (last-revision 
"/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/" 1)) (xhg (local-tree 
"/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/")) t)
  apply(dvc-dvc-file-diff ("trunk/themes/knowledgeblog/home.php" (xhg 
(last-revision "/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/" 1)) (xhg 
(local-tree "/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/")) t))
  apply(apply dvc-dvc-file-diff ("trunk/themes/knowledgeblog/home.php" (xhg 
(last-revision "/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/" 1)) (xhg 
(local-tree "/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/")) t))
  dvc-apply("dvc-file-diff" ("trunk/themes/knowledgeblog/home.php" (xhg 
(last-revision "/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/" 1)) (xhg 
(local-tree "/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/")) t))
  dvc-file-diff("trunk/themes/knowledgeblog/home.php" (xhg (last-revision 
"/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/" 1)) (xhg (local-tree 
"/mnt/sdb1/home/phillord/src/ht/knowledgeblog/devel/")) t)
  dvc-diff-diff()
  call-interactively(dvc-diff-diff nil nil)

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