FTP fails with invalid server name after IP change

I have a number of sftp accounts that use an IP for the url. They have always worked. Recently, the server that has that IP was replaced so a new IP is now used. When trying to access any of those accounts, with the new IP, the connection fails. The only entry in the ftp log is "Invalid Server name or address: ". If I use the same credentials in Filezilla, the connection works. Any idea what the problem is?

It's doing that after updating the FTP Address Book to use the new IP?

Try closing all existing Opus windows, in case any old references to the site are still around.

If that still doesn't work, use File > Exit Directory Opus to completely shut down the program, then restart it.

I had already done that. Even rebooted to eliminate that possibility.

Make sure there isn’t a stray space at the start or end of the address.

That was it. A copy/paste caused a line return to be copied. Entering manually allowed it to work. Thank you.