Cannot Record Two Simultaneous Programs

[whurlston]

The dynamic tuner allocation should be disabled. If that still doesn't help, set the application to "ATSC/QAM - Other".

[tjb]

The dynamic tuner allocation should be disabled. If that still doesn't help, set the application to "ATSC/QAM - Other".

Now that I disabled dynamic tuner allocation, I am back to my original problem (that's probably how I had the HDHR configured before the rebuild. Now I can start the first recording OK, but as soon as I start a second, Npvr crashes and creates a crash.mdmp file

[whurlston]

Did you try changing the application?

[tjb]

Did you try changing the application?

Yes, I tried several settings but they did not seem to make a difference. I appreciate the thoughts, and I think you may have steered me in the right direction. I believe now the problem is in my HDHR setup, not in Npvr. I have an idea that I want to try out and I will post the results when done.

[tjb]

Whurlston,

Once again, thanks for your help so far. The idea I had did not help. I do have another question about the HDHR setup. Under the advanced setting. the option for "Windows Media Center background channel scan" was enabled. I tried to disable it, but it appears to not take effect. I disable it, click Apply, then exit out - when I restart the HDHR setyp it is always reenabled. Could this be the cause of my problems? Also, under Advanced settings, what should "BDA Drivers" be set to, Auto or Normal?

[whurlston]

To disable the background channel scan manually, do the following:

1. Open Regedit (run as admin if UAC is enabled) and browse to
   Code:

   HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Media Center\Service\BackgroundScanner
2. Create a new DWORD value, and name it PeriodicScanEnabled and set the ValueData to 0
   
3. Close Regedit, and reboot the box.
   

For the BDA Driver setting, I actually use "Inject CVTC" but I'm on QAM cable. Either "Auto" or "Normal" should be fine for OTA ATSC.

I'm not sure either of those are the issue though. Do you have a software firewall running by any chance?

[tjb]

Just the windows firewall, and Nrecord as well as NextPvr are both open. I can scan the channels and they all come up fine. Most of the time, the first record (after a reboot) will work. Earlier today I actually got two recordings at one time, but it was a fluke. The next single recording I tried caused a crash.mdmp. I will try disabling the scan manually, but as you said, I don't have a lot of hope any more. May have to stick with GbPvr. I have spent days and days trying to figure out why only my system crashes with Npvr.

BTW, even when Nprv recording is not working, I can view stations using the HDHR setup utility, so the HDHR is working.

[whurlston]

When it causes the crash dump, does it pop up a window showing the call stack?

[sub]

I loaded up the dump file from earlier in the thread, but unfortunately the stack frame showed nothing useful. It was dying inside ntdll.dll somewhere, and there were no NPVR components in that stack trace.

[tjb]

When it causes the crash dump, does it pop up a window showing the call stack?

No, in fact I only get something in the task bar, which if I click on it it says there is a process that wants to display a message. I click on view message and get a message box about the crash.mdmp file (which I included one of these back on the first post in this thread. No call stack though, unless it is contained in the dmp file.

Other times, the recording service simply stops, and if I'm lucky, restarting it will actually cause both recordings to start (but not always). Still other times the recording service hangs (although the first program is still recording) and it cannot be stopped. Also, NextPvr and Ntray are hung.