Problem with arp-scan

[Bill Moffitt]

Working with 18.06, arp-scan works as expected; e.g.

# arp-scan -I br-lan -l
Interface: br-lan, datalink type: EN10MB (Ethernet)
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/ieee-oui.txt: 
No such file or directory
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/ieee-iab.txt: 
No such file or directory
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/mac-vendor.txt: 
No such file or directory
Starting arp-scan 1.9.5 with 256 hosts 
(https://github.com/royhills/arp-scan)
172.22.47.1    de:9f:db:05:46:5d    (Unknown)
172.22.47.53    00:24:8c:9d:1d:92    (Unknown)
172.22.47.77    0c:ef:af:c4:f5:b5    (Unknown)
172.22.47.111    3c:2a:f4:b8:25:c2    (Unknown)
172.22.47.116    00:02:d1:43:e8:5b    (Unknown)
172.22.47.186    00:c0:ca:8d:4d:2c    (Unknown)
172.22.47.108    00:40:8c:a5:e8:03    (Unknown)
172.22.47.186    00:c0:ca:8d:4d:2c    (Unknown) (DUP: 2)
172.22.47.132    2c:aa:8e:9a:3a:94    (Unknown)

11 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.9.5: 256 hosts scanned in 1.810 seconds (141.44 
hosts/sec). 9 responded

But in 19.07.4, I get the following behavior:

# arp-scan -I br-lan -l
Interface: br-lan, datalink type: EN10MB (Ethernet)
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/ieee-oui.txt: 
No such file or directory
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/ieee-iab.txt: 
No such file or directory
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/mac-vendor.txt: 
No such file or directory
Starting arp-scan 1.9.5 with 256 hosts 
(https://github.com/royhills/arp-scan)

22 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.9.5: 256 hosts scanned in 1.854 seconds (138.08 
hosts/sec). 0 responded

Has anyone else seen this behavior? Any ideas what might be causing 
this? (e.g. misconfiguration of some sort)

-- 
Bill Moffitt