Thank you for your response!

> Were you able to see any (error-) message in the server window?

I could not see any message in the server window as it was directly closed.

> On you 64-bit hardware, are you running 64-bit or 32-bit windows?
> If 64-bit, did you install the 64-bit or 32-bit MonetDB/XQuery?

I am using 32-bit windows.

> The serialized size ("1 GB") does not say much about the actual complexity
> of the XML document, e.g., how many nodes, attributes, etc. does the
> document contain?
> Do you know these statistics, or could you share your document with us for
> testing?

I tested using XBench DCSD. The total numbers of nodes and attributes were almost 22-23 millions and 1.5 millions, respectively.

Thanks!
John