I use HTTrack 3.40 [XR&CO'2006] with the following command line:

httrack <http://www.blabla.com> \
-O /path/to/output \
-ndDR5H0o0s0zqX0 \
-#L100000000 \
-%A cgi,ssf,php3,php,php2,asp,aspx,jsp,pl,cfm,nsf=text/html \
-F "Mozilla/3.01 (X11; I; SunOS 5.5.1 sun4m)" \
-P ${PROXY_SERVER_ADDRESS} \
-* +*VDate* +*OpenDocument*

and receive the following error after some time:

httrack: htscache.c:350: cache_add: Assertion `zip_disk_write_failed' failed.

CRASH.TXT contains the following:

HTTrack 3.40.1 closed at 'htscache.c', line 350
Reason:
assert failed: zip_disk_write_failed

Does anyone has any idea what this means? I found no references to this kind
of error.. I'm grateful for any hint!

Greetz,
Kilian