Data Import Error w/ Cressi Leonardo

Kevin Darch default at
Mon Apr 7 00:32:42 PDT 2014

Hi Jef,

Yes, only 12 dives logged on the leonardo. I had previously imported upto #10, the latest dives #11 & #12 are those not wanting to import (dated 4/6). 

I am not sure if it makes any difference but I have dives logged upto #13 already within subsurface itself, some manual entries, I don’t think this matters as I understand it looks at the date/time to make sure it does not import duplicate dives. I also had merged dive 3/4/5 from the leonardo into a single dive within subsurface which alters dive #'s.


-----Original Message-----
From: Jef Driesen [mailto:jef at] 
Sent: Monday, April 7, 2014 3:17 PM
To: Kevin Darch
Cc: subsurface at
Subject: Re: Data Import Error w/ Cressi Leonardo

On 2014-04-07 06:40, Kevin Darch wrote:
> I seem to be getting a "dive data import error" when trying to import 
> my latest dives.
> PC is Win8.1, Subsurface, I am using a Cressi Leonardo, and 
> had no problem importing the data previously.
> Using the supplied Cressi PCInterface tool I am still able to import 
> the dives without error, so it would seem the data itself is not 
> corrupt.
> Though
> that tool is really sucky and cannot export to any useful formats (I 
> attached the x2 offending dives in the tools .txt export format).
> Getting a logfile/dumpfile seems to indicate an issue with ringbuffer 
> pointer? "ERROR: Invalid ringbuffer pointer detected. [in
> cressi_leonardo.c:341 (cressi_leonardo_extract_dives)]"
> Is there any recovery path you can suggest? I attached log & bin files 
> for reference.

This error typically indicates that your data somehow differs from the expected data format. Typically an incorrect assumption in the reverse engineering. In this case, it seems it's the logic to find the last valid dive that fails. We look for an empty logbook entries (all 0xFF bytes), but your data contains an empty entry that has a few bytes that are not 0xFF. And that causes it to get interpreted as a valid dive, but the data of course doesn't make any sense.

How many dives do you have? Am I correct that there are only 12 dives present?


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