diff --git a/src/iec61850/client/client_report.c b/src/iec61850/client/client_report.c
index 425db7ad..cd1594ee 100644
--- a/src/iec61850/client/client_report.c
+++ b/src/iec61850/client/client_report.c
@@ -31,8 +31,6 @@
 
 #include "libiec61850_platform_includes.h"
 
-#include <inttypes.h>
-
 struct sClientReport
 {
     ReportCallbackFunction callback;
@@ -462,7 +460,7 @@ iedConnection_handleReport(IedConnection self, MmsValue* value)
         matchingReport->timestamp = MmsValue_getBinaryTimeAsUtcMs(timeStampValue);
 
         if (DEBUG_IED_CLIENT)
-            printf("IED_CLIENT: report has timestamp %" PRIu64 "\n", matchingReport->timestamp);
+            printf("IED_CLIENT: report has timestamp %lu\n", matchingReport->timestamp);
 
         inclusionIndex++;
     }
diff --git a/src/mms/iso_client/iso_client_connection.c b/src/mms/iso_client/iso_client_connection.c
index 01a6c63b..709ce67b 100644
--- a/src/mms/iso_client/iso_client_connection.c
+++ b/src/mms/iso_client/iso_client_connection.c
@@ -128,13 +128,13 @@ getState(IsoClientConnection self)
     return stateVal;
 }
 
-static inline void
+static void
 setIntState(IsoClientConnection self, eIsoClientInternalState newState)
 {
     self->intState = newState;
 }
 
-static inline eIsoClientInternalState
+static eIsoClientInternalState
 getIntState(IsoClientConnection self)
 {
     return self->intState;
diff --git a/src/mms/iso_cotp/cotp.c b/src/mms/iso_cotp/cotp.c
index a6ef5ad8..e1955212 100644
--- a/src/mms/iso_cotp/cotp.c
+++ b/src/mms/iso_cotp/cotp.c
@@ -48,13 +48,13 @@
 static bool
 addPayloadToBuffer(CotpConnection* self, uint8_t* buffer, int payloadLength);
 
-static inline uint16_t
+static uint16_t
 getUint16(uint8_t* buffer)
 {
     return (buffer[0] * 0x100) + buffer[1];
 }
 
-static inline uint8_t
+static uint8_t
 getUint8(uint8_t* buffer)
 {
     return buffer[0];
@@ -115,7 +115,7 @@ getOptionsLength(CotpConnection* self)
     return optionsLength;
 }
 
-static inline void
+static void
 writeStaticConnectResponseHeader(CotpConnection* self, int optionsLength)
 {
     /* always same size (7) and same position in buffer */
@@ -161,7 +161,7 @@ writeDataTpduHeader(CotpConnection* self, int isLastUnit)
     self->writeBuffer->size = 7;
 }
 
-static inline int
+static int
 writeToSocket(CotpConnection* self, uint8_t* buf, int size)
 {
 #if (CONFIG_MMS_SUPPORT_TLS == 1)
@@ -659,7 +659,7 @@ CotpConnection_resetPayload(CotpConnection* self)
 }
 
 
-static inline int
+static int
 readFromSocket(CotpConnection* self, uint8_t* buf, int size)
 {
 #if (CONFIG_MMS_SUPPORT_TLS == 1)
diff --git a/src/mms/iso_mms/common/mms_value.c b/src/mms/iso_mms/common/mms_value.c
index 26a5b793..2b6e5f07 100644
--- a/src/mms/iso_mms/common/mms_value.c
+++ b/src/mms/iso_mms/common/mms_value.c
@@ -36,7 +36,7 @@
 
 #include <time.h> /* for ctime_r */
 
-static inline int
+static int
 bitStringByteSize(const MmsValue* value)
 {
     int bitSize = value->value.bitString.size;
@@ -1492,7 +1492,7 @@ exit_function:
     return self;
 }
 
-static inline void
+static void
 setVisibleStringValue(MmsValue* self, const char* string)
 {
     if (self->value.visibleString.buf != NULL) {
diff --git a/src/mms/iso_mms/server/mms_file_service.c b/src/mms/iso_mms/server/mms_file_service.c
index 7af7ba74..60ac9238 100644
--- a/src/mms/iso_mms/server/mms_file_service.c
+++ b/src/mms/iso_mms/server/mms_file_service.c
@@ -532,8 +532,12 @@ mmsServer_fileUploadTask(MmsServer self, MmsObtainFileTask task)
 
                 IsoConnection_sendMessage(task->connection->isoConnection, response, false);
 
-                FileSystem_closeFile(task->fileHandle);
-                deleteFile(MmsServerConnection_getFilesystemBasepath(task->connection), task->destinationFilename);
+                if (task->fileHandle) {
+                    FileSystem_closeFile(task->fileHandle);
+
+                    if (task->destinationFilename)
+                        deleteFile(MmsServerConnection_getFilesystemBasepath(task->connection), task->destinationFilename);
+                }
 
                 MmsServer_releaseTransmitBuffer(self);
 
@@ -657,15 +661,16 @@ mmsServer_handleObtainFileRequest(
             FileHandle fileHandle = openFile(MmsServerConnection_getFilesystemBasepath(connection),
                     destinationFilename, true);
 
+            task->connection = connection;
+            task->obtainFileRequestInvokeId = invokeId;
+
             if (fileHandle == NULL) {
                 task->state = MMS_FILE_UPLOAD_STATE_SEND_OBTAIN_FILE_ERROR_DESTINATION;
             }
             else {
                 /* send file open request */
                 task->lastRequestInvokeId = MmsServerConnection_getNextRequestInvokeId(connection);
-                task->connection = connection;
                 task->fileHandle = fileHandle;
-                task->obtainFileRequestInvokeId = invokeId;
 
                 strcpy(task->destinationFilename, destinationFilename);