Dave,

This may have nothing to do with your problem, but it does have some 
of the same symptoms.  Sometimes when studying instrument noise we 
like to analyze "events" spanning several days, often sampled at a 
fairly high rate.  At times I saw something similar to what you 
describe and spent a little time trying to understand it.  This is a 
summary I had made for some others of what I saw.

>There is still some weirdness in the way WinSDR Replay and WinQuake 
>work when creating and opening large .psn event files.  There is a 
>maximum number of samples that WinQuake will accept in a file.  The 
>weird part is that, if the limit is exceeded, WinQuake responds by 
>simply not displaying the name of the over-sized file in its 
>'Directory' function.  And, if you attempt to open a too-large event 
>file by double-clicking it in a Windows directory, WinQuake will 
>return an "Unknown file type" message and then crash, possibly also 
>with the Windows error  "There was a problem sending the command to 
>the program".
>
>The maximum numbers I have found for saving or opening '.psn' event files are:
>
>Rate   Time   Time  Samples Event File
>SPS  Minutes HH:MM           size KB
>1     1,439  23:59    86,340   169
>2     1,439  23:59   172,680   338
>4     1,439  23:59   345,360   675
>5     1,439  23:59   431,700   844
>10    1,439  23:59   863,400 1,687
>20    1,439  23:59 1,726,800 3,372
>25    1,439  23:59 2,158,500 4,217
>50    1,048  17:28 3,144,000 6,142
>100     524   8:44 3,144,000 6,142
>200     262   4:22 3,144,000 6,142
>
>The rule seems to be that WinSDR will save no more than 1,439 
>minutes and WinQuake will accept no more than 3,144,000 samples.
>When saving All channels, each one creates its own Event file, so 
>the same rules seem to apply to each channel.  It is possible that 
>these numbers may depend on the memory available in a particular 
>computer, though I doubt it.  These were determined by testing psn 
>type 4 event files with WinSDR 4.1.9, WinQuake 3.1.4b on 64-bit Windows 7.

Since I wrote that I believe someone demonstrated how to generate a 
..psn file, spanning more than 24 hours at the lower sample rates, but 
as I recall, it could never exceed 48 hours.

Hope that helps.

Regards,
Brett



At 11:44 PM 8/27/2011, you wrote:

>hi guys,
>
>    maybe some one has a bright idea and tell me, if so, what I may 
> be doing wrong
>
>there are a number of files that contributors post to the events 
>processor list
>that I am unable to open. here's a list of those I have discovered so far.....
>
>George Bush's ones   end in    xxxx.src.psn
>some one else ---  xxxx.td4a.psn
>some one else --- xxxx.l15b.psn
>some one else --- xxxx.rem.psn
>Michael Phillips --- xxxx.velocity.psn
>Michael Phillips --- xxxx.acceln.psn
>
>Yes I am running the latest ver of WQ  .... V3.1.8b4
>its running on XP Home with SP3
>
>Have already spoken to Michael via email, he's not aware of anything weird in
>his setup.  Am I the only one or are other people having probs opening all
>files submitted ?
>   Usually a box in WQ opens saying " unknown file type"
>
>Yes the files have been associated with WQ as can be seen by the WQ icon
>on the file when looking in win. explorer
>
>cheers
>Dave


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