Hmmm. That’s quite odd. The only thing I can think of that might be interfering with the asset swap in the way that you’ve described is if an Event Script is present that’s overriding Templater’s standard reversioning logic before it can be performed.
If that’s not the case, it might be beneficial to try manually replacing the asset in the AE Project panel by right-clicking on it and using the Replace Footage> File option. If that still doesn’t swap the file, there might be an issue with After Effects or this specific Project file that we’ll need to address.
Another option that might get things moving in the right direction would be to look at the templater.log and, more importantly, the templater.err files to see if there are any messages there that might give us a better idea of what’s happening when Templater attempts to reversion the layer in question.
If there is a failure reported in either of those files, we could be looking at a situation where another logic problem is causing Templater to stop the reversioning process before it can process the mp3 layer in question.
If you’d like to share those files here, we can certainly take a look. However, if the logs contain sensitive information, you can also get in touch with us at support@dataclay.com, and we’ll be more than happy to continue troubleshooting the issue through that channel.
Let us know how it goes and we’ll see where we need to go from there.
Thanks,
Jeff