Subversion Exception! "line 143: assertion failed (stream->read_fn != NULL)"

Hi,

I send you the message I received when I was trying to commit an update on
a file that I was working with.
I use a VPN connection to use SVN, and, at the first two attempts of commit
I was not able to connect to the VPN, therefore, I cancelled the
transaction.
Once I was able to connect to VPN, I tried to commit the change that I did,
and the process appeared to be right, because it was sending the file and
the progress bar was almost completed, but, instead of a confirmation, I
received a window saying that Tortoise SVN X64 has crashed, and, then,
received the following message:

---------------------------
Subversion Exception!
---------------------------
Subversion encountered a serious problem.
Please take the time to report this on the Subversion mailing list
with as much information as possible about what
you were trying to do.
But please first search the mailing list archives for the error message
to avoid reporting the same problem repeatedly.
You can find the mailing list archives at
http://subversion.apache.org/mailing-lists.html

Subversion reported the following
(you can copy the content of this dialog
to the clipboard using Ctrl-C):

In file
 'D:\Development\SVN\Releases\TortoiseSVN-1.8.7\ext\subversion\subversion\libsvn_subr\stream.c'
 line 143: assertion failed (stream->read_fn != NULL)
---------------------------
Aceptar

Thanks in advance for your help.
Regards,

-- 
*Stephany Escobar*