CRC errors result in deleted files.

[syth]

I've donwloaded a couple of things in the last couple of days (0.5.4) that show up in the log as having failed unpacking due to a crc error, but when I go to see if I can see which files are bad the download folder contains 0K

I will see error like this:

2010-09-05 19:05:19,100
WARNING:
CRC Error in (053FC683 -> 0FBD0AC7)
2010-09-05 19:05:54,054
WARNING:
CRC Error in (5A57A826 -> BB66ABA8)

[shypike]

These are individual messages that have a (potential) problem.
If par2 verification/repair is Ok and everything unpacks fine, then there's nothing worry about.
We are looking at reporting such problems only when it's relevant to do so.

[syth]

Sorry. THere was a script running that moved the failed files,leaving behind an empty directory. Is there a way to only have a script run if the download and unpack is successful?

[shypike]

Yes.
Set the option "post-process only verified downloads" in Config->Switches.
Alternatively you can examine the status parameter (#7), see: http://wiki.sabnzbd.org/user-scripts