This might provide additional information.
*Trying to retrieve CVD header of http://%s/%s
%cremote_cvdhead: write failed
%cremote_cvdhead: Error while reading CVD header from %s
%c%s not found on remote server
%cremote_cvdhead: Unknown response from %s (IP: %s): %s
%cremote_cvdhead: Unknown response from %s (IP: %s)
%cremote_cvdhead: Malformed CVD header (too short)
%cremote_cvdhead: Malformed CVD header (bad chars)
%cremote_cvdhead: Malformed CVD header (can't parse)
!getfile: Can't allocate memory for 'remotename'
*Trying to download http://%s/%s
*Trying to download http://%s/%s (IP: %s)
%cgetfile: Can't write to socket
%cgetfile: Error while reading database from %s: %s
%cgetfile: Error while reading database from %s (IP: %s): %s
^getfile: %s not found on %s (IP: %s)
%cgetfile: Unknown response from %s: %s
%cgetfile: Unknown response from %s (IP: %s): %s
%cgetfile: Unknown response from %s
%cgetfile: Unknown response from %s (IP: %s)
!getfile: Can't create new file %s in %s
!getfile: Can't create new file %s in the current directory
Hint: The database directory must be writable for UID %d or GID %d
getfile: Can't write %d bytes to %s
%cgetfile: Download interrupted: %s (Host: %s)
%cgetfile: Download interrupted: %s (IP: %s)
GET %s/%s HTTP/1.0
Host: %s
%sUser-Agent: %s
Connection: close
%s%s%s
!Can't allocate memory for filename!
!Can't read CVD header of new %s database.
^Mirror %s is not synchronized.
^Mirror is more than 1 version out of date. Recording mirror failure.
!updatedb: Unknown database name (%s) passed.
^Broken database version in TXT record.
^Invalid DNS reply. Falling back to HTTP mode.
^DNS record is older than 3 hours.
^No timestamp in TXT record for %s
^Broken database version in TXT record for %s
HTTPProxyUsername requires HTTPProxyPassword
%s is up to date (version: %d, sigs: %d, f-level: %d, builder: %s)
%s.%u.%u.%u.%u.%
s.ping.clamav.net ^Can't read %s header from %s
^Can't read %s header from %s (IP: %s)
^Current functionality level = %d, recommended = %d
Please check if ClamAV tools are linked against the proper version of libclamav
DON'T PANIC! Read
https://www.clamav.net/documents/installing-clamav !getpatch: Can't get path of current working directory
!chdir_tmp: dbname parameter value too long to create cvd file name: %s
!chdir_tmp: dbname parameter value too long to create cld file name: %s
!chdir_tmp: Can't access local %s database
!chdir_tmp: Can't create directory %s
!chdir_tmp: Can't unpack %s into %s
!chdir_tmp: Can't change directory to %s
Empty script %s, need to download entire database
%cgetpatch: Can't download %s from %s
!getpatch: Can't open %s for reading
^Incremental update failed, trying to download %s
!buildcld: Can't get path of current working directory
!buildcld: Can't access directory %s
!buildcld: Can't open %s for writing
!buildcld: Can't open directory %s
!buildcld: gzopen() failed for %s
!buildcld: COPYING file not found
!buildcld: Can't add COPYING to new %s.cld - please check if there is enough disk space available
Updates to main.cvd or safebrowsing.cvd may require 200MB of disk space or more
!buildcld: Can't add %s to new %s.cld - please check if there is enough disk space available
!buildcld: Can't add daily.cfg to new %s.cld - please check if there is enough disk space available
!buildcld: gzclose() failed for %s
!buildcld: close() failed for %s
!buildcld: Can't return to previous directory %s
^Can't unlink the old database file %s. Please remove it manually.
%s updated (version: %d, sigs: %d, f-level: %d, builder: %s)
^Your ClamAV installation is OUTDATED!
!Can't create temporary directory %s
ClamAV update process started at %s *Software version from DNS: %s
^Local version: %s Recommended version: %s
DON'T PANIC! Read
https://www.clamav.net/documents/upgrading-clamav !DatabaseCustomURL: URL must be shorter than %llu
!DatabaseCustomURL: Incorrect URL
DatabaseCustomURL: Incorrect URL
%s is up to date (version: custom database)
DatabaseCustomURL: file %s missing
DatabaseCustomURL: Can't copy file %s into database directory
!DatabaseCustomURL: Not supported protocol
%s updated (version: custom database, sigs: %u)
!--update-db=custom requires DatabaseCustomURL
^SafeBrowsing is disabled but can't remove old %s
^Bytecode is disabled but can't remove old %s
!checkdbdir: Can't open directory %s
!Corrupted database file %s: %s
!Can't remove broken database file %s, please delete it manually and restart freshclam
Corrupted database file renamed to %s
Database updated (%d signatures) from %s
Database updated (%d signatures) from %s (IP: %s)
!downloadmanager: OnOutdatedExecute: Incorrect version number string
!downloadmanager: Can't allocate memory for buffer
%s:%s *Loading signatures from %s
[...] ^pipe() failed: %s
^dup2() failed: %s
^fork() failed: %s
LibClamAV Warning: *%s ^waitpid() failed: %s
gmtime: %s
%a, %d %b %Y %X GMT TCP webcache %cinet_ntop() failed
Trying host %s (%s)...
!Can't create new socket: %s
^Using default client ip.
*Using ip '%s' for fetching.
http://%s *If-Modified-Since: %s
Reading CVD header (%s): *Connected to %s.
*Connected to %s (IP: %s).
HTTP/1.1 404 HTTP/1.0 404 HTTP/1.1 304 HTTP/1.0 304 OK (IMS)
HTTP/1.1 200 HTTP/1.0 200 HTTP/1.1 206 HTTP/1.0 206 HTTP/1.0 HTTP/1.1 OK