I used acid software to have the good CHDK version. I use a 16 Go SD card without autoboot method.
If CHDK starts then you have the correct CHDK version for your camera.
I've tried many intervalometer scripts. Those on Ubasic work fine, those under Lua don't.
That's because you have not installed CHDK correctly and are missing some required files. Lua is quite a bit more sophisticated than uBASIC and uses more files. uBASIC has limited features and does not need any additional files.
How did you install CHDK? Tell us the exact name of the file you downloaded. You need to use the Complete or Full version - not the Small version. For example, ixus105_sd1300-100b-1.4.1-4360-
full.zip (not ixus105_sd1300-100b-1.4.1-4360.zip)
For "firmware update" loading method, you can use a 16G card with a single partition but you need to extract
all of the files in the CHDK download
with the folder structure maintained. If the files are not located in the correct place on the SD card, Lua and many other CHDK features will not work.
Are you using a Mac or a PC to setup the SD card ? If its a Mac then this might help :
Mac - Still Having TroubleIs stick utility very different from acid ?
ACID simply tells you what firmware version you have.
STICK will download the correct version of CHDK for your camera, format and configure your SD card correctly, and then install CHDK correctly on the card.
Both utilities were written by the same person.