Subversion copy won't copy

[richardk]

I'm trying to use the Subversion Task to do a copy, in order to do a branch.
It isn't working for either of two reasons, neither of which makes sense to me.

I'm using subcommand = copy, as is conventional to create a branch.
The two Files/modules to process are as follows (slightly edited) :
https://svn.mydomain.com/svn/my_system/branches/Sources
https://svn.mydomain.com/svn/my_syst...ild-Dest32-4_7

If I enter these parameters, and include a log message I get the following error:
svn: E205009: Local, non-commit operations do not take a log message or revision properties

If I enter these parameters, and no log message I get the following error:
svn: E160013: Path 'https://svn.mydomain.com/svn/my_system/branches/Build-Dest32-4_7' not found in revision 817

I don't understand either of these messages. Both seem illogical in their circumstances.

The first message refers to a Local, non-commit operation, but it isn't. As a URL to URL copy it is not local and does commit.

The second message says the destination is "not found in revision nnn", which is absolutely true but seems nonsense. Of course it doesn't exist - I'm copying *to* it , so it shouldn't exist until after the copy has completed.

Can anyone advise ?

Regards,
Richard.