Saxon

Please supply a source document that demonstrates the problem.

How are you running the query (your specific sequence of API calls)?

When we use $variable for further use in for loop, then it works fine. Please guide why this happen.

When I am execute in application, then application will crash. Now I am trying it in Query.exe

Dipak, we can't help you unless you provide more detailed information. We can't guess what you are doing. You need to show us enough code so we can reproduce the effect you are seeing.