0x2740 = 10048(decimal) = WSAEADDRINUSE (address in use).
When this error occurs then most probably there are two applications trying to get control of a certain TCP or UDP port (bound to a specific IP address). One example is having an SMTP server running on a server and installing another application that has an SMTP component.
There are few ways to fix this situation:
- disable the application that is not intended to perform that task
- bound the applications to different IP addresses
- change the TCP/IP port used by one of the applications (this may not be a reasonable solutions for applications like SMTP serves since all the clients will try to connect to the "known" TCP/25 port).
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