2681370 - DirectConnect error: Lost connection to database (Unknown WINSOCK Err Code); No error message is available from the host.

• DirectConnect (DC) server log contains network error messages. The DC log shows:
• 
  Error: 30261 Severity: 10 TCPIP Network Error: { [NOTCONNECTED] Lost connection to database, ,
  Request(Disconnect),SubFunc(Succeeded), SYBTCP RetCode(0)
  Description(SYBTCP_SUCCEED), TCP API RetCode (0) Description(Unknown WINSOCK Err Code) } <HostName=xxxxxxx>, <PortNumber=6042>
  Host Message Text: No error message is available from the host. LogClientLogin
  
  

• The Mainframe CICS log shows these messages:
  
  DFHXS1201 08/13/2018 11:25:58 SCICSxxx The password supplied in the verification request for userid XXXX was invalid.
  This occurred in transaction SY01 when userid XXXX was signed on at netname ????????.
  DFHXS1203 08/13/2018 14:31:52 SCICSxxx The userid supplied in the verification request for userid xxxx is revoked.
  This occurred in transaction SY01 when userid xxxxx was signed on at netname ????????.

• DirectConnect 15.0.1
• Windows 2012

DC DFHXS1203 CICS Unknown WINSOCK , KBA , BC-SYB-MFC , Mainframe Connect (MFC) , Problem