Given: 

  DB<66> x $type
0  'SOCK_STREAM'

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You've apparently specified the socket type as a string, rather than the expected constant. Import the SOCK_STREAM constant from IO::Socket::INET, or better yet just don't specify it. IO::Socket::INET is smart enough to guess the socket type based on the protocol.

However, this is largely a guess, given you haven't shown your code. In the future it'd be far more helpful to show the actual code having the problem, rather than a debug trace of a core module.

In reply to Re: Socket.pm returning Protocol not supported by Somni
in thread Socket.pm returning Protocol not supported by gokuraku

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