Simple Replace Action Changes No Tags

Support
1

Mp3tag v3.26.

I have a batch of opus files (Vorbis Comments) with Composer fields in the Artist field.

This tends to happen often so I've made an action that I've been using for years. At some point in the last couple moths, it's stopped working.

Here's the action:
Replace "COMPOSER": "%COMPOSER%" -> "%ARTIST%"
It was created by selecting fields rather than typing them.

Trying it on a data set of 66 songs gives me the text on the bottom left saying:
"Formatted tags in 0 of 66 files.0 of 66 files renamed."

I've tried various things, including doing regexes and have not had any luck. I have no feedback as to why it's not working anymore.

2

A simple replace action does not allow format strings (which contains field references).
If you want to us a format string, you need a function that supports that, e.g. "Format tag field" for COMPOSER
Format string: $replace(%composer%,%artist%)
But it should be shorter to use
Format string: %artist%

3

Thank you for the expedient reply! Your solution worked!

I created a new action:
Format value "COMPOSER": %ARTIST%

And this changed it as needed.