You say:
"Downloaded Gizmo as the JRiver remotes cost money. Pointed it to my server key and it did not work. It tried to cycle through all the songs in an album, but didn't play anything and didn't give an error"Was this for local playback on the phone or targeting the Marantz? If Gizmo truly does not render music locally on your phone, then there is another problem, since Gizmo does not depend on DLNA for local playback.
Also try
JRiver Panel. Start with a web browser on your MC Server PC, entering
(server IP Address):52199/Panel. The number following the IP Address is MC's typical Library Server Port. You can confirm the port by looking at Library Server in
Tree > Services & Plug-ins > Media Network > Servers. Whatever works (hopefully) on the server, copy the same to a browser on your phone. Very simple. If it plays locally on phone, then try targeting the Marantz.
Gizmo and Panel absolutely should work for local playback where they both avoid DLNA. If they don't, then there is a security/router issue wrt the Library Server Port, or something is really off in your MC install/setup, or poor Wi-Fi network performance in the case of using the phone.
[BTW, I don't give a lot of weight to testing with the HEOS app (I know, it worked previously, nevertheless...). I prefer DLNA testing with one of the JRiver apps, or if necessary with Bubble, assuming the Marantz itself runs a functional DLNA Renderer over Wi-Fi (I have not looked into that).]
Which Windows version on the server? Are any Windows Updates sitting around waiting to be installed? If so, install them, reboot, and try again. Which anti-virus? JRiver strongly recommends Windows Defender, with any other AV uninstalled. Personally I have no issues with McAfee Total Protection (which nowadays uses Windows Defender Firewall).
The Media Network View for DLNA is probably set up sensibly since you report seeing the library remotely. But to cover the bases, I attached a screenshot of mine, since this Option path is easily missed. Test DLNA with a simple Album or Artist view.
Consider changing your MC Network Access_ ID.
Verify there is only a single version,
JRiver Media Center 33 Service, running in
Computer Management Services (type
Services into Windows search bar).
Consider uninstalling / reinstalling MC 33 (after saving a backup).
If still failing, I suggest recording a log file and see if it reveals anything to you. Otherwise, send the log to JRiver with a reference to this thread and your answers.
1) Open
Help > Logging > Reset Log (at bottom of popup).
2) Follow Steps 1 & 2 in the popup. Immediately play an album from Gizmo - presumably it will connect to MC server but skip through the tracks without playing, per your description.
3) As soon as Gizmo is "done", go to Step 3 "Report the Problem", which will save a time-stamped text log file, probably to your desktop.
Repeat for Panel in a separate log file.
Unless of course someone else chimes in with another idea.
3/15/2025 Additions + edited for clarity. (Note: Window Control Buttons (upper right corners) have been resized and repositioned since the screenshot).