Please make sure whether you have "master.xml" in the specified location.
Use the below code. 

open(XMLFILE, "/my/upload/path/master.xml") or die("Can't open  file m
+aster.xml : $!");

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also its best practice to close the filehandle after the usage. 
close(XMLFILE)

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In reply to Re^3: Print out an XML file to browser by siva kumar
in thread Print out an XML file to browser by lakeTrout

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