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>Can you upload the exact ProbaEFakt.txt file, compressed as a zip file?

Zoran, the file seems ok (although there are a few chars that do not look to be utf-8 encoded the way you intended, like in "GRADSKA BIBLIOTEKA PAN^EVO").

The error you're seeing may not be related to the actual data you're posting. Maybe it's a long shot, but can you try with a different library? Instead of "MSXML2.XMLHTTP.6.0", use "MSXML2.ServerXMLHTTP.6.0".