Record Error: Root element is missing.

[seattlefog]

I recently upgraded to v5. On 2 occasions I have received the "Root element is missing error." for programs scheduled to record. I was able to confirm that once this error occurred for a channel, all subsequent scheduled recordings for that channel failed. A quick record for a currently broadcast program on the channel succeeded but a subsequent scheduled program on that channel did not. I'm using a Hauppauge quad tuner. I upgraded to the latest drivers for it some weeks ago. Rebooting the PC seems to correct the error. During the upgrade i first ran the uninstall for v4, ran the v5 install, then copied the DB and config.xml files to the new data directory replacing their counterparts. The recording errors occurred on different channels. I believe on both occurrences I was watching a previously recorded program from a different channel. Perhaps that was delaying access to some file needed by the recording service? BTW Bitdefender blocked access to running the wscript invocation of the vbs file during installation. On initial launch of nextpvr win10 client, following pc reboot I sometimes receive "unable to communicate with server". relaunching the client seems to resolve that glitch. Other than these intermittent failures v5 seems to be working great.

[Graham]

On initial launch of nextpvr win10 client, following pc reboot I sometimes receive "unable to communicate with server". relaunching the client seems to resolve that glitch.

Windows 10 probably has the NextPVR Recorder Service installed as ... Delayed Start ... Several services are ... Delayed Start ... so that the Windows desktop is quickly responsive after a reboot allowing you to quickly start the NextPVR Player app ... which doesn't then work because the NextPVR Recorder Service is ... Delayed Start ... so that the Windows desktop is quickly responsive allowing you to quickly start the NextPVR Player app which doesn't then work because ...  

Type ... Services ... into the search box beside the Windows Start button ... double-click the NextPVR service and change the startup to ... Automatic ... without the ... Delayed Start

[seattlefog]

On initial launch of nextpvr win10 client, following pc reboot I sometimes receive "unable to communicate with server". relaunching the client seems to resolve that glitch.

Windows 10 probably has the NextPVR Recorder Service installed as ... Delayed Start ... Several services are ... Delayed Start ... so that the Windows desktop is quickly responsive after a reboot allowing you to quickly start the NextPVR Player app ... which doesn't then work because the NextPVR Recorder Service is ... Delayed Start ... so that the Windows desktop is quickly responsive allowing you to quickly start the NextPVR Player app which doesn't then work because ...  

Type ... Services ... into the search box beside the Windows Start button ... double-click the NextPVR service and change the startup to ... Automatic ... without the ... Delayed Start

Thanks Graham. I have now altered the service start to automatic. It was set to delayed start. I didn't experience this issue on v4. So perhaps the v5 installation set the nextpvr service to delayed start.

[Graham]

[quote pid="553018" dateline="1612958290"]
It was set to delayed start. I didn't experience this issue on v4. So perhaps the v5 installation set the nextpvr service to delayed start.

[/quote]

I suspect that the decision that a service should be ... Delayed Start ... is made by Windows and not by the installer ... It might be that that the V4 installation pre-dated the invention of ... Delayed Start ...

Can you replicate the "roor element is missing" problem and attach logs to a post telling us when the message appeared so that we know where to look in the logs.

[mvallevand]

Sub made the decision with V5 to have the delayed start because if the service starts before the tuners or the network for HDHR devices is not ready then they won't be detected and recordings will fail. I question disabling configured tuners on startup but that is a different question.

The root element issue seem to be related to starting the devices after a long pause, it seems like a power management issue to me.

Martin

[seattlefog]

Sub made the decision with V5 to have the delayed start because if the service starts before the tuners or the network for HDHR devices is not ready then they won't be detected and recordings will fail.  I question disabling configured tuners on startup but that is a different question.

The root element issue seem to be related to starting the devices after a long pause, it seems like a power management issue to me.

Martin

 Thanks for your response. The root element issue did not occur in the years I've been running v4. The PC is up 24x7, with occasional reboots. The root element issue did not occur near a reboot. The first instance occurred after 2 episodes were successfully recorded, and it failed on the next one(s). Given the 3 min pre and post padding, it was in fact still recording an episode when recording for the next should have started. They were scheduled back to back with no delay. Subsequent back to back recordings in the same series have not errored. Power mode is set to high performance. I'll set the service back to delayed start, in deference to sub and try not to launch the win10 client so soon after reboots. Let me know if there are any specific device/power settings you wish me to confirm.

[mvallevand]

It fails more than it succeeds after a long delay. Do you have keep digital tuners primed on? If not maybe turn that on

Martin

[seattlefog]

It fails more than it succeeds after a long delay.  Do you have keep digital tuners primed on? If not maybe turn that on

Martin

I'm not clear on your question. There are no explicit power management settings for the Hauppauge tuner in Device Manager. The root element missing error does not always occur after a recording delay. See my previous post regarding when it first occurred. This PC never sleeps either, being in high performance mode.

[mvallevand]

You have plenty more than two device failures in your logs. I don't know the significance of this

Code:

2021-02-06 22:57:00.161    [ERROR][5]    Failed to create IATSCLocator
2021-02-06 22:57:00.192    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 00:59:00.175    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 00:59:00.225    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 01:57:00.027    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 01:57:00.118    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 05:57:00.274    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 05:57:00.321    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 06:27:00.264    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 06:57:00.293    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 06:57:00.335    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 06:57:01.932    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 06:57:01.982    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 07:27:00.295    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 07:27:00.346    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 07:27:01.829    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 07:27:01.881    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 08:27:00.280    [ERROR][5]    Failed to create IATSCLocator
2021-02-07 08:27:00.330    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 08:27:01.956    [ERROR][4]    Failed to create IATSCLocator
2021-02-07 08:27:02.006    [ERROR][5]    Failed to create IATSCLocator
2021-02-09 06:30:00.305    [ERROR][5]    Failed to create IATSCLocator
2021-02-09 06:30:00.354    [ERROR][5]    Failed to create IATSCLocator
2021-02-09 06:30:00.399    [ERROR][4]    Failed to create IATSCLocator
2021-02-09 06:30:00.444    [ERROR][5]    Failed to create IATSCLocator

but these are bad. So I thought if you primed them they might not get suspended.

Code:

2021-02-06 19:57:00.196    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-06 19:57:00.274    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-06 22:57:00.161    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-06 22:57:00.192    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 00:57:00.023    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 00:59:00.175    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 00:59:00.225    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 01:57:00.027    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 01:57:00.118    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 05:57:00.274    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 05:57:00.321    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 05:57:00.368    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:27:00.204    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:27:00.224    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:27:00.264    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:57:00.293    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:57:00.335    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:57:01.902    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:57:01.932    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:57:01.952    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 06:57:01.982    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:00:00.157    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:00:00.177    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:00:00.200    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:00:00.220    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:27:00.296    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:27:00.347    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:27:01.792    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:27:01.829    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:27:01.854    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:27:01.881    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:30:00.289    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:30:00.328    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:30:00.354    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 07:30:00.383    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:05:42.732    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:05:50.137    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:05:50.161    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:27:00.280    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:27:00.330    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:27:01.906    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:27:01.956    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:27:01.976    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:27:02.006    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:30:00.051    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:30:00.091    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:30:00.111    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-07 08:30:00.141    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:27:00.101    [ERROR][6]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:27:00.166    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:27:00.216    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:27:00.267    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:30:00.306    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:30:00.355    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:30:00.399    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:30:00.445    [ERROR][5]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.
2021-02-09 06:30:00.477    [ERROR][4]    Unexpected error: System.NullReferenceException: Object reference not set to an instance of an object.

[Graham]

Do you have keep digital tuners primed on? If not maybe turn that on

Keep digital tuners primed ... https://github.com/sub3/NextPVR/wiki/Add...e-settings