"Save selection" fails regularly

I am connected via a LAN cable and use a 250 Mbit line, so that shouldn't be a problem. It is a company network with correspondingly good performance.

No other program has any problems saving files on this network – including other audio tools (e.g. Audacity). Even video editing with Premiere works without any problems directly on this network drive.

It is therefore not clear to me why Audition has problems when no other programme has any.

How is your network drive connected to your computer?

If it's an external drive, I'm surprised that it's not failing more! Network drives tend to be connected by the electronic equivalent of a piece of wet string, and saving audio to them directly has always been a no-no. The way around this is to make the save to a file on your actual machine, and then transfer that to the network drive. The handshaking protocol is somewhat different, and way more robust than an audio save.