diff --git a/unirec/include/unirec++/bidirectionalInterface.hpp b/unirec/include/unirec++/bidirectionalInterface.hpp
index b616db10..85a0c2b4 100644
--- a/unirec/include/unirec++/bidirectionalInterface.hpp
+++ b/unirec/include/unirec++/bidirectionalInterface.hpp
@@ -202,6 +202,8 @@ class UnirecBidirectionalInterface {
 	uint64_t m_sequenceNumber;
 	const void* m_prioritizedDataPointer;
 	bool m_sendEoFonExit;
+	bool m_isInitialized;
+
 	UnirecRecord m_unirecRecord;
 
 	friend class Unirec;
diff --git a/unirec/include/unirec++/outputInterface.hpp b/unirec/include/unirec++/outputInterface.hpp
index 0c5b518e..ff4015c4 100644
--- a/unirec/include/unirec++/outputInterface.hpp
+++ b/unirec/include/unirec++/outputInterface.hpp
@@ -137,6 +137,7 @@ class UnirecOutputInterface {
 	ur_template_t* m_template = nullptr;
 	uint8_t m_interfaceID;
 	bool m_sendEoFonExit;
+	bool m_isInitialized;
 	UnirecRecord m_unirecRecord;
 
 	friend class Unirec;
diff --git a/unirec/unirec++/bidirectionalInterface.cpp b/unirec/unirec++/bidirectionalInterface.cpp
index f67b2f7b..fb29bc12 100644
--- a/unirec/unirec++/bidirectionalInterface.cpp
+++ b/unirec/unirec++/bidirectionalInterface.cpp
@@ -13,15 +13,6 @@
 
 namespace Nemea {
 
-UnirecBidirectionalInterface::~UnirecBidirectionalInterface()
-{
-	if (m_sendEoFonExit) {
-		sendEoF();
-	}
-
-	ur_free_template(m_template);
-}
-
 UnirecBidirectionalInterface::UnirecBidirectionalInterface(
 	uint8_t inputInterfaceID,
 	uint8_t outputInterfaceID)
@@ -31,10 +22,20 @@ UnirecBidirectionalInterface::UnirecBidirectionalInterface(
 	, m_sequenceNumber(0)
 	, m_prioritizedDataPointer(nullptr)
 	, m_sendEoFonExit(true)
+	, m_isInitialized(false)
 {
 	setRequieredFormat("");
 }
 
+UnirecBidirectionalInterface::~UnirecBidirectionalInterface()
+{
+	if (m_sendEoFonExit && m_isInitialized) {
+		sendEoF();
+	}
+
+	ur_free_template(m_template);
+}
+
 std::optional<UnirecRecordView> UnirecBidirectionalInterface::receive()
 {
 	const void* receivedData;
@@ -95,6 +96,10 @@ void UnirecBidirectionalInterface::setRequieredFormat(const std::string& templat
 			"format.");
 	}
 
+	if (templateSpecification.empty()) {
+		return;
+	}
+
 	changeInternalTemplate(templateSpecification);
 }
 
@@ -120,6 +125,8 @@ void UnirecBidirectionalInterface::changeInternalTemplate(const std::string& tem
 	}
 
 	m_unirecRecord = createUnirecRecord();
+
+	m_isInitialized = true;
 }
 
 void UnirecBidirectionalInterface::changeTemplate()
diff --git a/unirec/unirec++/outputInterface.cpp b/unirec/unirec++/outputInterface.cpp
index a2e327b1..52413c78 100644
--- a/unirec/unirec++/outputInterface.cpp
+++ b/unirec/unirec++/outputInterface.cpp
@@ -17,12 +17,13 @@ UnirecOutputInterface::UnirecOutputInterface(uint8_t interfaceID)
 	: m_template(nullptr)
 	, m_interfaceID(interfaceID)
 	, m_sendEoFonExit(true)
+	, m_isInitialized(false)
 {
 }
 
 UnirecOutputInterface::~UnirecOutputInterface()
 {
-	if (m_sendEoFonExit) {
+	if (m_sendEoFonExit && m_isInitialized) {
 		sendEoF();
 	}
 
@@ -88,7 +89,7 @@ void UnirecOutputInterface::setAutoflushTimeout(int timeout)
 
 void UnirecOutputInterface::sendEoF() const
 {
-	char dummy[1] = {0};
+	char dummy[1] = { 0 };
 	trap_send(m_interfaceID, dummy, sizeof(dummy));
 }
 
@@ -116,6 +117,8 @@ void UnirecOutputInterface::changeTemplate(const std::string& templateFields)
 			"created.");
 	}
 	m_unirecRecord = createUnirecRecord();
+
+	m_isInitialized = true;
 }
 
 UnirecRecord UnirecOutputInterface::createUnirecRecord(size_t maxVariableFieldsSize)