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MullinRJ

Looking for list of XML error codes

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Does anyone know were a list of XML errors may be published? 

 

The following script was copied from the Developer Wiki from the VS:WriteXMLMemory() page. I modified it to trap any XML error generated along the way. On my computer running VW 2019 it generates an error for WriteXMLMemory(). The error is -21. Even with the -21 error, the function writes a value to variable "mem" which I display at the end of the program regardless of any errors.

PROCEDURE test;
VAR	xml : LONGINT;
	err : INTEGER;
	mem : DYNARRAY OF CHAR;
	value : STRING;
BEGIN
	mem := '';
	xml := InitXML;

	err := CreateNewXMLDocument(xml, 'root');
	if (err = 0) then begin
		err := SetElementValue(xml, '/root/value', '34');
		if (err = 0) then begin
			err := WriteXMLMemory(xml, mem);
			if (err = 0) then AlrtDialog(mem)
			else AlrtDialog(concat('Error= ', err, ' in WriteXMLMemory()'));
		end
		else AlrtDialog(concat('Error= ', err, ' in SetElementValue()'));
	end
	else AlrtDialog(concat('Error= ', err, ' in CreateNewXMLDocument()'));

	err := ReleaseXML(xml);
	if (err <> 0) then AlrtDialog(concat('Error= ', err, ' in ReleaseXML()'));
	
	{ Show value of  variable "mem" w/ or w/o XML errors }
	AlrtDialog(mem);

END;
RUN(test);

 

TIA,

Raymond

 

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Nicolas, thank you. That is exactly what I was looking for. Usually I look at the HTML and the Dev Wiki pages for calls that are confusing or under documented. I missed this one. I guess it wasn't confusing enough.

 

Now to find out why WriteXMLMemory() seems to work, yet kicks a -21 error (Invalid XML handle). Oh the joys of programming.

 

Again, thank you.

Raymond

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