I'm using PAMGuard to process some recordings and I keep having an issue where it is freezing. I'm trying to create an LTSA at the same time as using the GPL detector (for blue whale A/B calls). I have run just the GPL detector in the past without it stalling, but when I added the LTSA module, the software crashes after running about 24 hours of recordings. I know it's stalling because of the LTSA because PAMGuard throws a warning on the main panel of the software (see screenshot below). Is there anything I can do to fix how often it crashes? The files I am processing are sampled at 384kHz. I'm decimating them to 400Hz to run the GPL detector but I'm trying to create a full bandwidth LTSA. Is this just too much for PAMGuard to handle? See the second screenshot below for the DOS window

Warning from PAMGuard when it freezes

DOS window from PAMGuard when it crashes

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    $\begingroup$ This seems to be a bug in PAMGuard, so it might be more appropriate to send it to [email protected] $\endgroup$ Jul 21, 2022 at 10:25

1 Answer 1


It looks like there is a bug in the GPL detector. Can you make sure you are using the very latest version of PAMGuard and, if so, then please send this to [email protected] along with your .psfx file and an example of the audio data.

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    $\begingroup$ That is not a memory error, but an indexing error. Can you get the rest of the text out of that window rather than just sending a screen shot. It says how to do this at the top of the window - right click on the border to get a menu, then edit / select all, edit / copy, then paste. $\endgroup$ Jul 21, 2022 at 10:23

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