Easy job - My newest EA is not working: "Array out of range" - Can you fix it?

I have written a rather simple EA using (mainly) the indicators Williams A/D, CCI, OBV and an indicator of my own. This last indicator has been used successfully in a custom indicator, but now I want to integrate it into my EA in the form of a loop. However, for no apparant reason I keep getting the error message: "Array out of range". Can you fix it? Thanks in advance!