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<blockquote data-quote="GregorV" data-source="post: 295963" data-attributes="member: 57522">Hi blaudden,here my results:copied your DLL and started TVService:1. tune n-tv -&gt; does not work2. tune DW-TV -&gt; works3. tune n-tv -&gt; still not working4. do my initialization trick (change LNB settings from 11700 to 117015. tune n-tv -&gt; worksLogs from this attached.yesterday I could do some more tests. As mentioned earlier I can get much better results, if I exchange the function for finding the pin and I suspected Marshal.RealeaseComObject().So I tried a self written function using method Filter.FindPin which can be written without the need to free something.Indeed it found the correct pin, but the testing results were always no success.Then I did something desperate - because I usually would expect that this cannot work.I switched back to the DsFindPin.ByName and changed DsUtils.Into the finally section of that function I added&nbsp; 'Marshal.ReleaseComObject(pPins[0]);' that it now looks like below:[CODE]public static IPin ByName(IBaseFilter vSource, string vPinName)&nbsp; &nbsp; {...&nbsp; &nbsp; &nbsp; finally&nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; Marshal.ReleaseComObject(pPins[0]);&nbsp; &nbsp; &nbsp; &nbsp; Marshal.ReleaseComObject(ppEnum);&nbsp; &nbsp; &nbsp; }...[/CODE]This would destroy the return value but surprisingly I get results better than ever <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite5" alt=":confused:" title="Confused&nbsp; &nbsp; :confused:" loading="lazy" data-shortname=":confused:" />!Even on my other machine I can restart TVService as often as I want and always can tune high-bands.Nevertheless this cannot be the final solution because the code is not correct. But it points to a somehow mystery behavior of Marshal.ReleaseComObject.Also I still can get situations where this does not work - eg. after playing with different code the Hauppauge drivers or DS comes into a state where only low-bands can be tuned.This situation then requires a reboot and then it's fine again.Any ideas ?ThanksGregor</blockquote>

[QUOTE="GregorV, post: 295963, member: 57522"] Hi blaudden, here my results: copied your DLL and started TVService: 1. tune n-tv -> does not work 2. tune DW-TV -> works 3. tune n-tv -> still not working 4. do my initialization trick (change LNB settings from 11700 to 11701 5. tune n-tv -> works Logs from this attached. yesterday I could do some more tests. As mentioned earlier I can get much better results, if I exchange the function for finding the pin and I suspected Marshal.RealeaseComObject(). So I tried a self written function using method Filter.FindPin which can be written without the need to free something. Indeed it found the correct pin, but the testing results were always no success. Then I did something desperate - because I usually would expect that this cannot work. I switched back to the DsFindPin.ByName and changed DsUtils. Into the finally section of that function I added 'Marshal.ReleaseComObject(pPins[0]);' that it now looks like below: [CODE] public static IPin ByName(IBaseFilter vSource, string vPinName) { ... finally { Marshal.ReleaseComObject(pPins[0]); Marshal.ReleaseComObject(ppEnum); } ... [/CODE] This would destroy the return value but surprisingly I get results better than ever :S! Even on my other machine I can restart TVService as often as I want and always can tune high-bands. Nevertheless this cannot be the final solution because the code is not correct. But it points to a somehow mystery behavior of Marshal.ReleaseComObject. Also I still can get situations where this does not work - eg. after playing with different code the Hauppauge drivers or DS comes into a state where only low-bands can be tuned. This situation then requires a reboot and then it's fine again. Any ideas ? Thanks Gregor [/QUOTE]

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