vxrails update to 7.0.371 fails

Upgrading from 7.0.101 to 7.0.371 fails. (i have blotted out the hostname but it is valid and DNS lookups and pings work from vxrail manager and vcenter server). Any suggestions?

spotted in lcm-web.log:

2022-06-14 09:06:48,133 WARN [LCM] [lcm-vc-0] c.v.c.c.ScriptServiceImpl [ScriptServiceImpl.java:491] [/etc/vmware-marvin/scripts/lcm/scripts/upgrade-vc-iso.py@localhost]: 

 
   upgrade_vc_iso: INFO main:426 Script is invoked with args: Namespace(c=True, host='*****', p=False, u=False) 
upgrade_vc_iso: ERROR 
  
   :529 Failure due to: Traceback (most recent call last): File "/usr/lib64/python3.6/urllib/request.py", line 1349, in do_open encode_chunked=req.has_header('Transfer-encoding')) File "/usr/lib64/python3.6/http/client.py", line 1291, in request self._send_request(method, url, body, headers, encode_chunked) File "/usr/lib64/python3.6/http/client.py", line 1337, in _send_request self.endheaders(body, encode_chunked=encode_chunked) File "/usr/lib64/python3.6/http/client.py", line 1286, in endheaders self._send_output(message_body, encode_chunked=encode_chunked) File "/usr/lib64/python3.6/http/client.py", line 1046, in _send_output self.send(msg) File "/usr/lib64/python3.6/http/client.py", line 984, in send self.connect() File "/usr/lib64/python3.6/http/client.py", line 1444, in connect super().connect() File "/usr/lib64/python3.6/http/client.py", line 956, in connect (self.host,self.port), self.timeout, self.source_address) File "/usr/lib64/python3.6/socket.py", line 704, in create_connection for res in getaddrinfo(host, port, 0, SOCK_STREAM): File "/usr/lib64/python3.6/socket.py", line 745, in getaddrinfo for res in _socket.getaddrinfo(host, port, family, type, proto, flags): socket.gaierror: [Errno -2] Name or service not known