|There's more than one way to do things|
Compare the settings of path, assoc .pl & ftype perl on the two machines.
Therein (almost certainly) lies a difference; and explanation of the different behaviour.
Also, you can probably dodge the issue by using the full path of the svn command.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.