Urgent!! Do anyone know what this means ERROR:0009[040D:06]?

[emotech]

I am having a problem when i am dectecting the light intensity with a torch light and this error pops out and prevent it from loading certain motion page. The error is ERROR: 0009[ 040D:06 ] and ERROR: 0009[0557:06 ]. However, it did not give me any problem before, it only starts giving me troble after i added more code to the behavior control programmer. Please give me some advise and its urgent. Thank you!!

[limor]

Error 0009. Call Stack Overflow. Check whether you've used the "CALL" command 9 consecutive times

http://www.robotis.com/zbxe/qna_en/31827