--- a/src/XMLCommand.h	Fri Jan 11 15:01:02 2019 +0100
+++ b/src/XMLCommand.h	Fri Jan 11 16:13:21 2019 +0100
@@ -32,6 +32,7 @@
 #include <relpipe/writer/typedefs.h>
 
 #include "StreamInputSource.h"
+#include "XercesStringConvertor.h"
 
 namespace relpipe {
 namespace in {
@@ -46,21 +47,7 @@
 	class RelpipeSaxHandler : public xercesc::DefaultHandler {
 	private:
 		unique_ptr<RelationalWriter> writer;
-
-		std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
-
-		string_t toString(const XMLCh * const chars) {
-			// XMLCh = char16_t
-			// „All XML data is handled within Xerces-C++ as strings of XMLCh characters. Regardless of the size of the type chosen, the data stored in variables of type XMLCh will always be utf-16 encoded values.“
-			// see https://xerces.apache.org/xerces-c/program-others-3.html
-			// other solution (depends on boost): https://flylib.com/books/en/2.131.1/working_with_xerces_strings.html
-
-			// TODO: review this text conversion and test on various platforms
-			char* x = XMLString::transcode(chars);
-			string s = string(x);
-			XMLString::release(&x);
-			return convertor.from_bytes(s);
-		}
+		XercesStringConvertor xConvertor;
 
 	public:
 
@@ -81,25 +68,25 @@
 
 		void startElement(const XMLCh * const uri, const XMLCh * const localname, const XMLCh * const qname, const Attributes& attrs) override {
 			writer->writeAttribute(L"startElement");
-			writer->writeAttribute(toString(uri));
-			writer->writeAttribute(toString(localname));
-			writer->writeAttribute(toString(qname));
+			writer->writeAttribute(xConvertor.toString(uri));
+			writer->writeAttribute(xConvertor.toString(localname));
+			writer->writeAttribute(xConvertor.toString(qname));
 			writer->writeAttribute(L"");
 
 			for (int i = 0; i < attrs.getLength(); i++) {
 				writer->writeAttribute(L"attribute");
-				writer->writeAttribute(toString(attrs.getURI(i)));
-				writer->writeAttribute(toString(attrs.getLocalName(i)));
-				writer->writeAttribute(toString(attrs.getQName(i)));
-				writer->writeAttribute(toString(attrs.getValue(i)));
+				writer->writeAttribute(xConvertor.toString(attrs.getURI(i)));
+				writer->writeAttribute(xConvertor.toString(attrs.getLocalName(i)));
+				writer->writeAttribute(xConvertor.toString(attrs.getQName(i)));
+				writer->writeAttribute(xConvertor.toString(attrs.getValue(i)));
 			}
 		}
 
 		void endElement(const XMLCh * const uri, const XMLCh * const localname, const XMLCh * const qname) override {
 			writer->writeAttribute(L"endElement");
-			writer->writeAttribute(toString(uri));
-			writer->writeAttribute(toString(localname));
-			writer->writeAttribute(toString(qname));
+			writer->writeAttribute(xConvertor.toString(uri));
+			writer->writeAttribute(xConvertor.toString(localname));
+			writer->writeAttribute(xConvertor.toString(qname));
 			writer->writeAttribute(L"");
 		}
 
@@ -108,7 +95,7 @@
 			writer->writeAttribute(L"");
 			writer->writeAttribute(L"");
 			writer->writeAttribute(L"");
-			writer->writeAttribute(toString(chars));
+			writer->writeAttribute(xConvertor.toString(chars));
 		}
 
 		void comment(const XMLCh * const chars, const XMLSize_t length) override {
@@ -116,7 +103,7 @@
 			writer->writeAttribute(L"");
 			writer->writeAttribute(L"");
 			writer->writeAttribute(L"");
-			writer->writeAttribute(toString(chars));
+			writer->writeAttribute(xConvertor.toString(chars));
 		}
 
 		void startCDATA() override {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/XercesStringConvertor.h	Fri Jan 11 16:13:21 2019 +0100
@@ -0,0 +1,57 @@
+/**
+ * Relational pipes
+ * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <string>
+#include <codecvt>
+
+#include <xercesc/util/XMLString.hpp>
+
+#include <relpipe/writer/typedefs.h>
+
+namespace relpipe {
+namespace in {
+namespace xml {
+
+using namespace std;
+using namespace xercesc;
+using namespace relpipe::writer;
+
+class XercesStringConvertor {
+private:
+	wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
+
+public:
+
+	string_t toString(const XMLCh * const chars) {
+		// XMLCh = char16_t
+		// „All XML data is handled within Xerces-C++ as strings of XMLCh characters. Regardless of the size of the type chosen, the data stored in variables of type XMLCh will always be utf-16 encoded values.“
+		// see https://xerces.apache.org/xerces-c/program-others-3.html
+		// other solution (depends on boost): https://flylib.com/books/en/2.131.1/working_with_xerces_strings.html
+
+		// TODO: review this text conversion and test on various platforms
+		char* x = XMLString::transcode(chars);
+		string s = string(x);
+		XMLString::release(&x);
+		return convertor.from_bytes(s);
+	}
+};
+
+}
+}
+}

--- a/src/relpipe-in-xml.cpp	Fri Jan 11 15:01:02 2019 +0100
+++ b/src/relpipe-in-xml.cpp	Fri Jan 11 16:13:21 2019 +0100
@@ -30,6 +30,7 @@
 #include <relpipe/cli/CLI.h>
 
 #include "XMLCommand.h"
+#include "XercesStringConvertor.h"
 
 using namespace relpipe::cli;
 using namespace relpipe::writer;
@@ -51,15 +52,14 @@
 		fwprintf(stderr, L"Debug: Input stream: eof=%ls, lastRead=%d\n", (cin.eof() ? L"true" : L"false"), cin.gcount());
 		resultCode = CLI::EXIT_CODE_DATA_ERROR;
 	} catch (const xercesc::XMLException& e) {
-		// TODO: print message
-		// char* message = xercesc::XMLString::transcode(e.getMessage());
-		fwprintf(stderr, L"Caught xercesc::XMLException\n");
+		XercesStringConvertor xConvertor;
+		fwprintf(stderr, L"Caught xercesc::XMLException: %ls\n", xConvertor.toString(e.getMessage()).c_str());
 		fwprintf(stderr, L"Debug: Input stream: eof=%ls, lastRead=%d\n", (cin.eof() ? L"true" : L"false"), cin.gcount());
 		resultCode = CLI::EXIT_CODE_UNEXPECTED_ERROR;
 	} catch (const xercesc::SAXParseException& e) {
-		// TODO: print message
-		// char* message = xercesc::XMLString::transcode(e.getMessage());
-		fwprintf(stderr, L"Caught xercesc::SAXParseException\n");
+		XercesStringConvertor xConvertor;
+		fwprintf(stderr, L"Caught xercesc::SAXParseException: %ls\n", xConvertor.toString(e.getMessage()).c_str());
+		fwprintf(stderr, L"\tat line: %d, column: %d\n", e.getLineNumber(), e.getColumnNumber());
 		fwprintf(stderr, L"Debug: Input stream: eof=%ls, lastRead=%d\n", (cin.eof() ? L"true" : L"false"), cin.gcount());
 		resultCode = CLI::EXIT_CODE_UNEXPECTED_ERROR;
 	}