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Here is the setting:

Background: I want to transfer a large part of my repository to an "archive" repository.

I have two bare repositories: develop_new.git , archive.git

I write into the file "C:\Git\Test\develop_new.git\objects\info\alternates" the following line:

/c/Git/Test/archive.git/objects
Want I want to do:
$ git replace --graft <commit_1> <commit_2>
in order to establish a history link between these two repositories.
commit_1 is the first commit in develop_new.git. commit_2 is the second last commit in archive.git.
Problem:
The following error occurs:
  
error: object directory /c/Git/Test/archive.git/objects does not exist; check .git/objects/info/alternates.
despite the fact that the directory actually exists.
What could be the problem?
Thanks!
In my tests, I had to use a relative path from the current repo's object store to the alternate object store.  That is, given
  repo1/
    .git/
  repo2/
    .git/
      objects/
        info/
in repo2/.git/objects/info/alternates I could say
../../../repo1/.git/objects
but I could not say
/c/repo1/.git/objects
The docs do suggest that absolute paths should work locally, so I considered that maybe it was a path syntax mismatch (because I'm on Windows); and indeed
c:/repo1/.git/objects
works for me.
If you're going to access the repo remotely, absolute paths may again not work (per the docs); in that case you may want to look at using http-alternates
        
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