Compiling error: Couldn't open *.bc.xml for read!

Now I am able to compile it successfully w/o the -o option. Here are the steps I followed:

1. aoc -c kernel1.cl kernel2.cl

2. aoc -rtl kernel1.cl kernel2.cl

3. aoc kernel2.aocr

It seems that -o option in the second step only renames the directory, but not the required file names within it (e.g., *.bc.xml etc). Now the question is how to use the -o option correctly for aoc -rtl so that both directory and file names are renamed?

Thanks