EOleException: Microsoft MSXML is not installed when calling LoadXMLDocument

LoadXMLDocument returns IXMLDocument which by default uses MSXML on Windows. MSXML is a COM componet which requires client to initialize COM library. Below shows a bare bones Delphi 11.3 console application initializing COM library.

	program Project1;
	{$APPTYPE CONSOLE}
	{$R *.res}
	uses
	ActiveX,
	ComObj,
	System.SysUtils,
	Xml.XMLDoc,
	Xml.XMLIntf;
	var
	XmlDoc: IXMLDocument;
	begin
	try
	try
	CoInitializeEx(nil,
	ActiveX.COINIT_MULTITHREADED
	);
	XmlDoc := LoadXMLDocument('test.xml');
	XmlDoc._Release;
	XmlDoc := nil;
	except
	on E: Exception do
	Writeln(E.ClassName, ': ', E.Message);
	end;
	finally
	CoUninitialize;
	end;
	end.

view raw Project1.dpr hosted with ❤ by GitHub

Tags: COM, DCOM, Delphi, XML