diff --git a/include/dbcppp/CApi.h b/include/dbcppp/CApi.h
index 7203b061..24c22a0b 100644
--- a/include/dbcppp/CApi.h
+++ b/include/dbcppp/CApi.h
@@ -77,6 +77,11 @@ extern "C"
     typedef struct {} dbcppp_Attribute;
     typedef struct {} dbcppp_SignalType;
     typedef struct {} dbcppp_Signal;
+    typedef struct {} dbcppp_SignalMultiplexerValue;
+    typedef struct {
+        uint64_t from;
+        uint64_t to;
+    } dbcppp_ValueRange;
     typedef struct {} dbcppp_ValueEncodingDescription;
     
     DBCPPP_API const dbcppp_Attribute* dbcppp_AttributeCreate(
@@ -235,6 +240,11 @@ extern "C"
     DBCPPP_API const char* dbcppp_SignalName(const dbcppp_Signal* sig);
     DBCPPP_API dbcppp_ESignalMultiplexer dbcppp_SignalMultiplexerIndicator(const dbcppp_Signal* sig);
     DBCPPP_API uint64_t dbcppp_SignalMultiplexerSwitchValue(const dbcppp_Signal* sig);
+    DBCPPP_API uint64_t dbcppp_SignalMultiplexerValues_Size(const dbcppp_Signal* sig);
+    DBCPPP_API const dbcppp_SignalMultiplexerValue* dbcppp_SignalMultiplexerValues_Get(const dbcppp_Signal* sig, uint64_t i);
+    DBCPPP_API const char* dbcppp_SignalMultiplexerValue_SwitchName(const dbcppp_SignalMultiplexerValue* mux_val);
+    DBCPPP_API uint64_t dbcppp_SignalMultiplexerValue_ValueRanges_Size(const dbcppp_SignalMultiplexerValue* mux_val);
+    DBCPPP_API const dbcppp_ValueRange* dbcppp_SignalMultiplexerValue_ValueRanges_Get(const dbcppp_SignalMultiplexerValue* mux_val, uint64_t i);
     DBCPPP_API uint64_t dbcppp_SignalStartBit(const dbcppp_Signal* sig);
     DBCPPP_API uint64_t dbcppp_SignalBitSize(const dbcppp_Signal* sig);
     DBCPPP_API dbcppp_ESignalByteOrder dbcppp_SignalByteOrder(const dbcppp_Signal* sig);
diff --git a/include/dbcppp/SignalMultiplexerValue.h b/include/dbcppp/SignalMultiplexerValue.h
index a76e9580..5c69fa95 100644
--- a/include/dbcppp/SignalMultiplexerValue.h
+++ b/include/dbcppp/SignalMultiplexerValue.h
@@ -27,7 +27,7 @@ namespace dbcppp
         virtual std::unique_ptr<ISignalMultiplexerValue> Clone() const = 0;
 
         virtual ~ISignalMultiplexerValue() = default;
-        virtual std::string SwitchName() const = 0;
+        virtual const std::string& SwitchName() const = 0;
         virtual const Range& ValueRanges_Get(std::size_t i) const = 0;
         virtual uint64_t ValueRanges_Size() const = 0;
 
diff --git a/src/libdbcppp/CApi.cpp b/src/libdbcppp/CApi.cpp
index fccf68d7..2cf8a1bb 100644
--- a/src/libdbcppp/CApi.cpp
+++ b/src/libdbcppp/CApi.cpp
@@ -54,7 +54,7 @@ extern "C"
         case IAttributeDefinition::EObjectType::Node: return dbcppp_EObjectType::dbcppp_ObjectType_Node;
         case IAttributeDefinition::EObjectType::Message: return dbcppp_EObjectType::dbcppp_ObjectType_Message;
         case IAttributeDefinition::EObjectType::Signal: return dbcppp_EObjectType::dbcppp_ObjectType_Signal;
-        default: return dbcppp_EObjectType::dbcppp_ObjectType_EnvironmentVariable; 
+        default: return dbcppp_EObjectType::dbcppp_ObjectType_EnvironmentVariable;
         }
     }
     DBCPPP_API dbcppp_EAttributeValueType dbcppp_AttributeValueType(const dbcppp_Attribute* attribute)
@@ -88,7 +88,7 @@ extern "C"
         auto ai = reinterpret_cast<const AttributeImpl*>(attribute);
         return std::get<std::string>(ai->Value()).c_str();
     }
-    
+
     DBCPPP_API dbcppp_AttributeDefinition* dbcppp_AttributeDefinitionCreate(
           const char* name
         , dbcppp_EObjectType object_type
@@ -879,6 +879,31 @@ extern "C"
         auto sigi = reinterpret_cast<const SignalImpl*>(sig);
         return sigi->MultiplexerSwitchValue();
     }
+    DBCPPP_API uint64_t dbcppp_SignalMultiplexerValues_Size(const dbcppp_Signal* sig)
+    {
+        auto sigi = reinterpret_cast<const SignalImpl*>(sig);
+        return sigi->SignalMultiplexerValues_Size();
+    }
+    DBCPPP_API const dbcppp_SignalMultiplexerValue* dbcppp_SignalMultiplexerValues_Get(const dbcppp_Signal* sig, uint64_t i)
+    {
+        auto sigi = reinterpret_cast<const SignalImpl*>(sig);
+        return reinterpret_cast<const dbcppp_SignalMultiplexerValue*>(&sigi->SignalMultiplexerValues_Get(i));
+    }
+    DBCPPP_API const char* dbcppp_SignalMultiplexerValue_SwitchName(const dbcppp_SignalMultiplexerValue* mux_val)
+    {
+        auto sigi = reinterpret_cast<const ISignalMultiplexerValue*>(mux_val);
+        return sigi->SwitchName().c_str();
+    }
+    DBCPPP_API uint64_t dbcppp_SignalMultiplexerValue_ValueRanges_Size(const dbcppp_SignalMultiplexerValue* mux_val)
+    {
+        auto sigi = reinterpret_cast<const ISignalMultiplexerValue*>(mux_val);
+        return sigi->ValueRanges_Size();
+    }
+    DBCPPP_API const dbcppp_ValueRange* dbcppp_SignalMultiplexerValue_ValueRanges_Get(const dbcppp_SignalMultiplexerValue* mux_val, uint64_t i)
+    {
+        auto sigi = reinterpret_cast<const ISignalMultiplexerValue*>(mux_val);
+        return reinterpret_cast<const dbcppp_ValueRange*>(&sigi->ValueRanges_Get(i));
+    }
     DBCPPP_API uint64_t dbcppp_SignalStartBit(const dbcppp_Signal* sig)
     {
         auto sigi = reinterpret_cast<const SignalImpl*>(sig);
diff --git a/src/libdbcppp/SignalMultiplexerValueImpl.cpp b/src/libdbcppp/SignalMultiplexerValueImpl.cpp
index 7e4f07f1..9c9a6013 100644
--- a/src/libdbcppp/SignalMultiplexerValueImpl.cpp
+++ b/src/libdbcppp/SignalMultiplexerValueImpl.cpp
@@ -25,7 +25,7 @@ std::unique_ptr<ISignalMultiplexerValue> SignalMultiplexerValueImpl::Clone() con
     return std::make_unique<SignalMultiplexerValueImpl>(*this);
 }
 
-std::string SignalMultiplexerValueImpl::SwitchName() const
+const std::string& SignalMultiplexerValueImpl::SwitchName() const
 {
     return _switch_name;
 }
diff --git a/src/libdbcppp/SignalMultiplexerValueImpl.h b/src/libdbcppp/SignalMultiplexerValueImpl.h
index e4e609f6..3ba9342b 100644
--- a/src/libdbcppp/SignalMultiplexerValueImpl.h
+++ b/src/libdbcppp/SignalMultiplexerValueImpl.h
@@ -15,7 +15,7 @@ namespace dbcppp
             
         virtual std::unique_ptr<ISignalMultiplexerValue> Clone() const override;
 
-        virtual std::string SwitchName() const override;
+        virtual const std::string& SwitchName() const override;
         virtual const Range& ValueRanges_Get(std::size_t i) const override;
         virtual uint64_t ValueRanges_Size() const override;
 
diff --git a/tests/Catch2.cpp b/tests/Catch2.cpp
index 7791d9b7..50ef7abf 100644
--- a/tests/Catch2.cpp
+++ b/tests/Catch2.cpp
@@ -3742,6 +3742,10 @@ PVOID FatalConditionHandler::exceptionHandlerHandle = nullptr;
 
 #elif defined( CATCH_CONFIG_POSIX_SIGNALS )
 
+// https://stackoverflow.com/questions/71454588/minsigstksz-error-after-update-in-my-manjaro-linux
+#undef MINSIGSTKSZ
+#define MINSIGSTKSZ 65536
+
 namespace Catch {
 
     struct SignalDefs {