Hi Damian thanks for your reply, and it works but when I am uploading the file the structure shows in refractive index, index difference y values the refractive index values coming in 0.0002 like that (it is not correct my guess). anyhow I am attaching my txt files (the modified format files like you mentioned in BCF2DPC) if you dont mind kindly look on my files
with many many advance thanks
Ashok
