diff --git a/CMakeLists.txt b/CMakeLists.txt
index 31b84aa..e965e34 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_policy(SET CMP0072 NEW) #  FindOpenGL prefers GLVND by default
 project(QAD)
 set(QAD_MAJOR    2)
 set(QAD_MINOR    28)
-set(QAD_REVISION 0)
+set(QAD_REVISION 1)
 set(QAD_SUFFIX   )
 set(QAD_COMPANY  SHS)
 set(QAD_DOMAIN   org.SHS)
diff --git a/libs/piqt/piqt.h b/libs/piqt/piqt.h
index 1079727..0ac280c 100644
--- a/libs/piqt/piqt.h
+++ b/libs/piqt/piqt.h
@@ -55,21 +55,26 @@ QAD_PIQT_EXPORT PIVariant Q2PIVariant(const QVariant & v);
 
 // inline QString PI2QString(const PIString & v) {return QString::fromLocal8Bit(v.data());}
 inline QString PI2QString(const PIString & v) {
+	if (v.isEmpty()) return QString();
 	return QString::fromUtf8(v.dataUTF8());
 }
 #if PIP_VERSION >= PIP_MAKE_VERSION(2, 38, 0)
 inline QString PI2QString(const PIConstChars & v) {
+	if (v.isEmpty()) return QString();
 	return QString::fromLatin1(v.data(), v.length());
 }
 #endif
 
 // inline PIString Q2PIString(const QString & v) {return PIString(v.toLocal8Bit().data());}
 inline PIString Q2PIString(const QString & v) {
-	return PIString::fromUTF8(v.toUtf8().data());
+	if (v.isEmpty()) return PIString();
+	auto qba = v.toUtf8();
+	return PIString::fromUTF8(qba.constData(), qba.size());
 }
 
 
 inline QStringList PI2QStringList(const PIStringList & v) {
+	if (v.isEmpty()) return QStringList();
 	QStringList ret;
 	for (const auto & s: v)
 		ret << PI2QString(s);
@@ -77,6 +82,7 @@ inline QStringList PI2QStringList(const PIStringList & v) {
 }
 
 inline PIStringList Q2PIStringList(const QStringList & v) {
+	if (v.isEmpty()) return PIStringList();
 	PIStringList ret;
 	ret.reserve(v.size());
 	for (const auto & s: v)
@@ -86,10 +92,12 @@ inline PIStringList Q2PIStringList(const QStringList & v) {
 
 
 inline QByteArray PI2QByteArray(const PIByteArray & v) {
+	if (v.isEmpty()) return QByteArray();
 	return QByteArray((const char *)(v.data()), v.size_s());
 }
 
 inline PIByteArray Q2PIByteArray(const QByteArray & v) {
+	if (v.isEmpty()) return PIByteArray();
 	return PIByteArray(v.constData(), v.size());
 }