Creating groups, moving items into groups causes subsequent transfer to fail

[optoisolated]

I noticed an issue whereby when I transfer files, then group them, the subsequent transfers will fail with an error as shown below.

Error: Failed to execute 'controlTransferIn' on 'USBDevice': A transfer error has occurred.

This only happens when I create a group and then try to transfer more files. If i transfer all the files first, then group them, it's completely fine. The only way to continue transferring and working on the disc is to physically disconnect the player and re-connect the player.

Steps to reproduce:

1. Connect to Minidisc player
2. Transfer any file(s)
3. Select any file(s) and click the Group button
4. Transfer another file.

[asivery]

What device are you using @optoisolated ?

[optoisolated]

It's a Sony MZ-N707.

[optoisolated]

Upon further use, I've noticed that the issue seems to happen whenever I try to make any change to the TOC, such as adding or changing a group, doing a rename of a track, or re-ordering a track, and then trying to upload a new song. I have to close the app, and disconnect and reconnect the recorder, then reopen and connect the app.
As a workaround I've been doing all the uploads first, then doing all the renaming, grouping etc at the end. That works.

[optoisolated]

A simpler workaround I've figured out is simply to hit the "Stop" button on the MZ-N707, triggering the TOC commit. When committed, I can then copy files again. I assume then the issue is that the TOC isn't being written after each file move/rename/change/group etc...

[asivery]

@optoisolated Yes, I have been able to reproduce the problem with my MZ-N505. Seems like it's another issue with the current implementation of Type-R devices. I'll try to fix it, but not sure if the fix will come in the next version of WMDPro, or the one after that, since this update is pretty big...