ナレッジベース(KB)

記事 0045

421 No Transfer Timeout

Problem

421 No Transfer Timeout (120 seconds): closing control connection. Connection closed.

Cause

The FTP server is set to log you off at the specified idle time limit.

You can try adding a few commands to the SmartFTP Keep Alive feature to help you stay connected. For more information, please read the following knowledge base article.
KB: How To keep a connection open

キーワード
keep alive, connection, timeout

関連記事
How To keep a connection open