circular dependncy

I am getting this error for one of my calcs. However I have two measures where I use a number of calcs one after the other which are dependant on the one before etc ... However the one lot so calcs works perfectly while the other has this error on the last calculation .I have gone through each and every calc and I just cannot find the problem calculation.

If I mail the workbook to you can you try and see if you can help?

thanks

Marc