TortoiseSVN error- Can’t create tunnel

It might be this: http://www.uwplatt.edu/csse/tools/subversion/subversion-help.html#messages

open the Settings menu, click on the Network icon, and make sure "SSH client" is set to the path for "TortoisePLink.exe"
(see also http://tortoisesvn.sourceforge.net/docs/release/TortoiseSVN_en/ch05s25.html#tsvn-DUG-settings-network)

If not, can you give some information about the repository you are trying to browse?

Well the repository I am trying to browse is on an Apple server.  I'm not sure what info about the repository you are looking for and how to query it in order to supply it.  Thanks.  

By the way the documentation you pointed me to is very good.

how does the url of the repository start?
For example it could be
    svn://
or
    svn+ssh://
or
    https://
....

Hi cwwkie,

It starts with svn+ssh://

Then I think it is related to the TortoisePLink.exe. Have you verified it exists, and appears correctly in the configuration?

and take a look at this: http://tortoisesvn.sourceforge.net/?q=node/5 (only the client parts)

I am actually using Putty Plink.exe.  Here is my command line in my Network tab box:

C:\Program Files\Putty\Plink.exe-batch Development

> C:\Program Files\Putty\Plink.exe-batch Development

If it is exactly as you type it here, the problem is probably a missing space between Plink.exe and -batch:
  C:\Program Files\Putty\Plink.exe -batch Development

Well the batch option only works if there is no space between the e and the -.   Strange.  The error occurs at the same place if I use the batch option or not.

Because the path contains spaces, you probably need to put quotes around it, and I think Development does not belong there.
  "C:\Program Files\Putty\Plink.exe" -batch

When I used "C:\Program Files\Putty\Plink.exe"-batch
I now received this error message:

Error*Connection closed unexpectedly

with or without the -batch option

Thanks for your help cwwkie.

I figured it out.  I am using TortoisePlink.exe -2 -i  name_of_private_key_file.