softRTC maybe a problem?
I had this same exact program that use to run, or keep time fairly well, back before simpletools was created. Now I ran this program on my ActivityBot and my PropBOE board, the results are the same, in a ten minute run of the program it looses about six minutes. I wonder if somebody else could try this and see if they are getting the same or similar results. This was done in simple view, I added <time.h> and <sys/rtc.h>, maybe the experts can look at it and see if there are some glaring mistakes.
Ray
Ray

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http://forums.parallax.com/showthread.php/148030-Soft-RTC?p=1184427&viewfull=1#post1184427
_rtc_start_timekeeping_cog(); // <---- important. print("This is softRTC\n"); print("help - for menu\n");Ray