forum.heinrichsweikamp.com

Hello,

last weekend I experience a not so nice event. wile diving the calculation of the deco was frozen at 2 min at 3 meter stop. After changing the back to deco gas on my way back up, it defrost, but showed at the beginning 999min TTS.

Afterwards it showed compared to my runtime table longer deco stops. GF20/80 was set. After loading it up to Subsurface it showed that i was within limits.

I attach the screenshot of the computer.

did anyone observed the same issue? It is an OSTC2 with 2.27 version and yes I now updated it

Hi Nils,

fully agree a freezing shall never happen. It's hard to do a diagnostics in this case, as many data would be needed: gas settings incl. change depths, detailed dive profile (one the minute, on the meter), surface pressure, tissue pressures at the beginning of the dive etc. to re-run the calculations. As the computer did not hang-up completely but could be recovered by toggling the active gas, it looks like as if the deco calculation routine got caught in an infinite loop finding no "way up". As long as a calculation is running, the results from the last run are shown, so what was shown on the display during the hang propably were the last valid results.

Keeping the OSTC up-to-date with latest firmware is always a good idea. The current stable one is 2.98. It has a known bug of "lost gas"-function not working, but generally bears many improvements over the sub 2.9x releases. The next firmware will be 2.99, it will be another major step forward in terms of functionalities and fine-tuning. Development phase has finished recently and after some time of internal testing it will be made available, either straight as release version or as an updated 2.99 beta first. Don't use the current 2.99 beta, it's a demonstrator for the transmitter functions on the OSTC TR only.

best regards,
Ralph