XML Input error

[suryadev]

Hello,

I am trying to parse an XML file so imported the metadata and the derivation has ns1: in all the columns which gave an error for prefix After that I loaded the namespace declaration and now I get the below error
XML input document parsing failed. Reason: Xalan fatal error (publicId: , systemId: , line: 2, column: 1): Invalid document structure

The XML looks fine because it can be opened in the IE. Please suggest if there are any changes I need to do. Thanks!