Hi Ankita,
I am having major difficulties communicating with XL. When I run teh subvi's on their own there are no errors, but As soon as I run a vi with sub vi's (which are communicating with XL) I have errors of Null Refnum as input and I think something else as well. I once solved it by putting in a small wait at the beginning of my subvi, but this has not helped in other subvi's.
I am quite worried, because I have a deadline of Friday and this issue is a HUGE problem. I am attaching my program if it helps at all.
Thank-you!
IBAHKA