What does a Return Value of 0 with a Socket Error Indicate?
XCOM™ Data Transport® for Windows
Transfers may receive an error message such as XCOMN0298E unable to allocate remote tp, TXPI 211 socket connect error, rv=0. What does a return value of 0 mean?
A return value of 0 associated with a socket error frequently indicates a problem with a firewall.
How can I test if there is a firewall problem?
Here are some things to look at:
Note: The firewall problem may be on the local or remote system.