attempt to perform arithmetoic on a global (now a nil value) - TERMINATED - Script Writing

Andre-K

attempt to perform arithmetoic on a global (now a nil value) - TERMINATED

« on: 14 / January / 2015, 04:18:50 »

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a Part of my script should shutdown the camera if done taking pictures, and if idle for 60 sec.
I get the error in subject after a few pictures.

repeat
   sleep(60)
   x=get_usb_power(0)
   if (autoshdn > 0 and picturecount > 5 and get_day_seconds-lastpicturesec > autoshdnsec) then shutdown() end
until x>0

Why fdoes this happen ?

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waterwingz

11494

Re: attempt to perform arithmetoic on a global (now a nil value) - TERMINATED

« Reply #1 on: 14 / January / 2015, 07:59:39 »

I would be easier to answer that question if you posted the whole script. The actaul error message with line number would be good to know as well.

At a guess, this line is probably the problem :

Code: [Select]

if (autoshdn > 0 and picturecount > 5 and get_day_seconds-lastpicturesec > autoshdnsec) then shutdown() endas it's the only thing in your code doing arithmetic.

I'd suggest changing it to :

Code: [Select]

if (autoshdn > 0 and picturecount > 5 and get_day_seconds()-lastpicturesec > autoshdnsec) then shutdown() endas the get_day_seconds()-lastpicturesec > autoshdnsec part is not evaluated until after the sixth picture is taken.

« Last Edit: 14 / January / 2015, 08:10:20 by waterwingz »

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Ported : A1200 SD940 G10 Powershot N G16