FAQ - Nothing Downloads
People occasionally write us and ask "why is News Rover not retrieving
the messages or files I expect it to". Often they add "I'm sure they
are there because I can see them with another newsreader".
The most common single cause of this confusion has to do with the
initial setup of an interest group. A point which is described in
the interest group configuration wizard but then often overlooked
is that the initial scan of a newsgroup does not necessarily get
all the messages and files in that newsgroup. The reasons for this
is that many newsgroups have so many messages that retrieving them
all could take all day. Instead, News Rover asks how many days the
initial scan should go back. It then scans headers (assuming that
they come sorted in date order) and performs a "binary search" to
locate the first message that is as old as you want. By default the
initial scan for a newsgroup goes back 30 days.
Once News Rover has managed to finish scanning a newsgroup, it
remembers which articles it has seen and only asks for the new
ones next time it visits. News Rover does this using the "article
number", which is a sequence number assigned to news articles by
the news server. These sequence numbers increase indefinitely.
Suppose that News Rover read articles 98445 to 98545 last time it
scanned a news group. Upon issuing the group command, the news
server should respond with a message telling what articles are now
in the newsgroup. Following this example, it may be 98430 to 99000.
News Rover would then begin requesting headers, 100 at a time,
starting with a request for 98546 to 98645.
You can force News Rover to go back and reread articles which it has
seen before by setting the "number of days to go back in the next
scan". This value appears in the dates property sheet of the interest
group's configuration. Note that this value is not stored on disk and
remembered between runs; it only applies to the next run.
One possible problem which can cause News Rover to retrieve no messages
is that sometimes the article numbers get corrupted on the news server.
You can determine this by watching the event log when News Rover first
goes into a newsgroup. Sometimes, for example, we see News Rover
reporting that the newsgroup contains articles 0 to 0.
Another reason that News Rover may not be retrieving the messages or
files you want is that you may have incorrectly specified a search
criteria. Many people, for example, try to specify that they want all
messages containing orange, apple, or apricot and specify the selection
This would only match articles containing these three words in this
order! The correct expression would have been:
orange or apple or apricot
Yet another configuration problem which can cause News Rover to miss
messages you think you want is that there may be attached files which
are not listed in the subject. There is a checkbox labeled "only scan
messages if a filename is in the subject" which controls this.
If, after reading this over, you are still convinced that News Rover is
missing messages or files it should not, perform the following steps:
1. Look at the statistics after a newsgroup scan completes. This is
done by clicking control, then statistics. The statistics may well
tell you what fate the missing messages and files have met.
2. Watch the event log while News Rover scans the newsgroup. The
event log contains additional detail about what happens to each
message. Starting with version 3.0 revision 2, the event log
identifies each message by using the article id described above.
This helps track exactly where every message went. If you want
even more detail, proceed to step 3:
3. Go to the advanced configuration page and check the box labeled
"log all server I/O communications". This causes News Rover to show
every record written to, and read from, the news server. In other
words, the event log now includes all the data flowing instead of
just comments by Rover. Sometimes this makes the problem clear.
4. If you are still stumped, leave "log all server I/O" engaged,
also check "write event log to file", do a run, let News Rover scan
a newsgroup, and send us the event.log file which will be writen
into the \program files\newsrover directory (or an alternate folder
you installed the product in). Tell us what you expected and got
and we will give you an authoritative answer as to why News Rover
got what it did.