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Subversion to TFS 2010: Dealing with invalid Subversion SSL certificates and migrations

TL;DR; Explains how invalid Subversion SSL certificates can block SVN to TFS 2010 migrations, causing connection errors, and details steps to resolve certificate issues.

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Subversion to TFS 2010: Dealing with invalid Subversion SSL certificates and migrations

Migrating data from SVN to TFS can be both a timely and a costly business. I was trying out the two tools TFS Integration Platform & Timely Migration but I ran into what looked like the same problem in both if them.


Although I do have permission I can’t get the tools to talk and load from Subversion with the following effect / error messages:

So, what is the problem?

Well, Thorsten figured it out that the invalid digital certificate used for Subversion is blocking the ability for the tool to access it and throwing up very misleading error messages. If you run the standard SVN tool against that repository and try to access any of the files you will be asked what to do about the problem:

1svn.exe co https://host/PathToYourRepo c:somethinglocalfolder

This command will download the latest sources locally if you let it run but it will also, If there is a certificate mismatch / error the command line tool will ask you what to do.

Subversion to TFS 2010: Dealing with invalid Subversion SSL certificates and migrations

Figure: Options for accepting certificate

Typically you have three options:

If you select “(p)ermenantly” you will then be able to run the migration tools successfully. You will need to do this for every Subversion Repository you want to migrate from. Or, you can fix the certificate or just remove it.

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