diff --git a/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer b/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer
index 3878acc84..b389ffb25 100755
Binary files a/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer and b/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer differ
diff --git a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
index c56c51af0..ac79cc752 100644
--- a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
@@ -1079,8 +1079,8 @@ int checkDetectorType() {
         return -1;		
 	}
 	int type = atoi(buffer);
-	if (type > TYPE_TOLERANCE) {
-        FILE_LOG(logERROR, ("No Module attached! Expected %d for Mythen3, got %d\n", TYPE_MYTHEN3_MODULE_VAL, type));
+	if (type > TYPE_NO_MODULE_STARTING_VAL) {
+        FILE_LOG(logERROR, ("No Module attached! Expected %d for Mythen, got %d\n", TYPE_MYTHEN3_MODULE_VAL, type));
         return -2;	
 	}
 
diff --git a/slsSupportLib/include/network_utils.h b/slsSupportLib/include/network_utils.h
index faa2f3625..ca90002bc 100755
--- a/slsSupportLib/include/network_utils.h
+++ b/slsSupportLib/include/network_utils.h
@@ -40,8 +40,8 @@ class MacAddr {
   public:
     constexpr MacAddr() noexcept = default;
     explicit constexpr MacAddr(uint64_t mac) noexcept : addr_{mac} {}
-    MacAddr(std::string mac);
-    MacAddr(const char *address);
+    explicit MacAddr(std::string mac);
+    explicit MacAddr(const char *address);
     std::string str() const;
     std::string hex() const;
     constexpr bool operator==(const MacAddr &other) const noexcept {
diff --git a/slsSupportLib/include/versionAPI.h b/slsSupportLib/include/versionAPI.h
index 7c506e2b9..4530378fe 100644
--- a/slsSupportLib/include/versionAPI.h
+++ b/slsSupportLib/include/versionAPI.h
@@ -8,5 +8,5 @@
 #define APIJUNGFRAU 0x191127
 #define APICTB 0x191210
 #define APIEIGER 0x200110
-#define APIMYTHEN3 0x200115
+#define APIMYTHEN3 0x200120
 #define APIGOTTHARD2 0x200116
diff --git a/slsSupportLib/src/network_utils.cpp b/slsSupportLib/src/network_utils.cpp
index a5630eb4e..2a55ab8ed 100755
--- a/slsSupportLib/src/network_utils.cpp
+++ b/slsSupportLib/src/network_utils.cpp
@@ -136,7 +136,7 @@ MacAddr InterfaceNameToMac(const std::string& inf) {
 
 		if (-1==ioctl(sock, SIOCGIFHWADDR, &ifr)) {
 			perror("ioctl(SIOCGIFHWADDR) ");
-			return std::string("00:00:00:00:00:00");
+			return MacAddr{};
 		}
 		for (int j=0, k=0; j<6; j++) {
 			k+=snprintf(mac+k, mac_len-k-1, j ? ":%02X" : "%02X",
diff --git a/slsSupportLib/tests/test-network_utils.cpp b/slsSupportLib/tests/test-network_utils.cpp
index 94b8fc1e2..33757d64c 100755
--- a/slsSupportLib/tests/test-network_utils.cpp
+++ b/slsSupportLib/tests/test-network_utils.cpp
@@ -22,8 +22,8 @@ TEST_CASE("Convert mac address using classes", "[support]") {
 
         CHECK(mac0 == vec_addr[i]);
         CHECK(mac1 == vec_addr[i]);
-        CHECK(mac0 == vec_ans[i]);
-        CHECK(mac1 == vec_ans[i]);
+        CHECK(mac0.str() == vec_ans[i]);
+        CHECK(mac1.str() == vec_ans[i]);
         CHECK(mac0.str() == vec_ans[i]);
         CHECK(mac1.str() == vec_ans[i]);
     }
@@ -59,8 +59,8 @@ TEST_CASE("Convert IP using classes ", "[support]") {
         CHECK(ip0 == ip1);
         CHECK(ip0 == vec_addr[i]);
         CHECK(ip1 == vec_addr[i]);
-        CHECK(ip0 == vec_ans[i]);
-        CHECK(ip1 == vec_ans[i]);
+        CHECK(ip0.str() == vec_ans[i]);
+        CHECK(ip1.str() == vec_ans[i]);
         CHECK(ip0.str() == vec_ans[i]);
         CHECK(ip0.arr().data() == vec_ans[i]);
         CHECK(ip1.str() == vec_ans[i]);