"clamav-unofficial-sigs" error message

[Carmel NY]

I recently installed clamav-unofficial-sigs via the ports system. The
port version is quite old,v5.3.2, while the current version is v5.6.2.
In any case, I am receiving the following error message repeatedly: 

Jun 24 15:45:00 ERROR: clamscan binary (clamscan_bin) not found

This is the full log from the last 12 hours or so:

Jun 24 15:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 16:38:57 Preparing Databases
Jun 24 16:38:58 Sanesecurity Database File Updates
Jun 24 16:38:58 2 hours have not yet elapsed since the last sanesecurity update check
Jun 24 16:38:58 No update check was performed at this time
Jun 24 16:38:58 Next check will be performed in approximately 0 hour(s), 53 minute(s)
Jun 24 16:38:58 SecuriteInfo Database File Updates
Jun 24 16:38:58 4 hours have not yet elapsed since the last SecuriteInfo update check
Jun 24 16:38:58 No update check was performed at this time
Jun 24 16:38:58 Next check will be performed in approximately 2 hour(s), 53 minute(s)
Jun 24 16:38:58 linuxmalwaredetect Database File Updates
Jun 24 16:38:58 6 hours have not yet elapsed since the last linux malware detect update check
Jun 24 16:38:58 No update check was performed at this time
Jun 24 16:38:58 Next check will be performed in approximately 4 hour(s), 53 minute(s)
Jun 24 16:38:58 MalwarePatrol Database File Update
Jun 24 16:38:58 24 hours have not yet elapsed since the last MalwarePatrol download
Jun 24 16:38:58 No database download was performed at this time
Jun 24 16:38:58 Next download will be performed in approximately 22 hour(s), 53 minute(s)
Jun 24 16:38:58 Setting permissions and ownership
Jun 24 16:38:58 No updates detected, ClamAV databases were not reloaded
Jun 24 16:38:58 Issue tracker : https://github.com/extremeshok/clamav-unofficial-sigs/issues
Jun 24 16:38:59 New version : v5.6.2 @ https://github.com/extremeshok/clamav-unofficial-sigs
Jun 24 16:38:59       Powered By https://eXtremeSHOK.com      
Jun 24 16:41:07 Preparing Databases
Jun 24 16:41:08 Sanesecurity Database File Updates
Jun 24 16:41:08 2 hours have not yet elapsed since the last sanesecurity update check
Jun 24 16:41:08 No update check was performed at this time
Jun 24 16:41:08 Next check will be performed in approximately 0 hour(s), 50 minute(s)
Jun 24 16:41:08 SecuriteInfo Database File Updates
Jun 24 16:41:08 4 hours have not yet elapsed since the last SecuriteInfo update check
Jun 24 16:41:08 No update check was performed at this time
Jun 24 16:41:08 Next check will be performed in approximately 2 hour(s), 50 minute(s)
Jun 24 16:41:08 linuxmalwaredetect Database File Updates
Jun 24 16:41:08 6 hours have not yet elapsed since the last linux malware detect update check
Jun 24 16:41:08 No update check was performed at this time
Jun 24 16:41:08 Next check will be performed in approximately 4 hour(s), 50 minute(s)
Jun 24 16:41:08 MalwarePatrol Database File Update
Jun 24 16:41:08 24 hours have not yet elapsed since the last MalwarePatrol download
Jun 24 16:41:08 No database download was performed at this time
Jun 24 16:41:08 Next download will be performed in approximately 22 hour(s), 50 minute(s)
Jun 24 16:41:08 Setting permissions and ownership
Jun 24 16:41:08 No updates detected, ClamAV databases were not reloaded
Jun 24 16:41:08 Issue tracker : https://github.com/extremeshok/clamav-unofficial-sigs/issues
Jun 24 16:41:08 New version : v5.6.2 @ https://github.com/extremeshok/clamav-unofficial-sigs
Jun 24 16:41:08       Powered By https://eXtremeSHOK.com      
Jun 24 16:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 17:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 18:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 19:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 20:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 21:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 22:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 24 23:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 25 00:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 25 01:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 25 02:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 25 03:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 25 04:45:00 ERROR: clamscan binary (clamscan_bin) not found
Jun 25 05:45:00 ERROR: clamscan binary (clamscan_bin) not found

I have no idea what the problem is.

-- 
Carmel