Good day

I have been trying to update my BT5 but to no avail.
Scouring the internet in search of the solution has not helped my cause either.

I have successfully updated my BT5 in the past and use the system variable (http_proxy) to store my proxy settings.

When I attempt updating, I get this:
apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up w3af (1.2-bt0) ...
tar: pybloomfiltermmap-0.2.0.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Exiting with failure status due to previous errors
/var/lib/dpkg/info/w3af.postinst: line 4: cd: pybloomfiltermmap-0.2.0: No
/ such file or directory
python: can't open file '': [Errno 2] No such file or directory
svn: OPTIONS of '': could
not connect to server (
dpkg: error processing w3af (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

Any advice would be appreciated