diff --git a/codec/decoder/core/src/mem_align.cpp b/codec/decoder/core/src/mem_align.cpp
index b0dc5eb4..55d9103c 100644
--- a/codec/decoder/core/src/mem_align.cpp
+++ b/codec/decoder/core/src/mem_align.cpp
@@ -53,8 +53,8 @@ void_t* WelsMalloc (const uint32_t kuiSize, const str_t* kpTag) {
 
 #ifdef MEMORY_CHECK
   if (pMemCheckMalloc == NULL) {
-    pMemCheckMalloc = WelsFopen (".\\mem_check_malloc.txt", "at+");
-    pMemCheckFree   = WelsFopen (".\\mem_check_free.txt", "at+");
+    pMemCheckMalloc = WelsFopen ("mem_check_malloc.txt", "at+");
+    pMemCheckFree   = WelsFopen ("mem_check_free.txt", "at+");
   }
 
   if (kpTag != NULL) {
diff --git a/codec/encoder/core/inc/param_svc.h b/codec/encoder/core/inc/param_svc.h
index a003878d..db70654e 100644
--- a/codec/encoder/core/inc/param_svc.h
+++ b/codec/encoder/core/inc/param_svc.h
@@ -113,10 +113,6 @@ typedef struct TagWelsSvcCodingParam {
 SDLayerParam	sDependencyLayers[MAX_DEPENDENCY_LAYER];
 
 /* General */
-#ifdef ENABLE_TRACE_FILE
-str_t			sTracePath[MAX_FNAME_LEN];		// log file for wels encoder
-#endif
-
 uint32_t	uiGopSize;			// GOP size (at maximal frame rate: 16)
 uint32_t	uiIntraPeriod;		// intra period (multiple of GOP size as desired)
 int32_t		iNumRefFrame;		// number of reference frame used
diff --git a/codec/encoder/core/src/encoder_ext.cpp b/codec/encoder/core/src/encoder_ext.cpp
index 003ec6d5..a3317070 100644
--- a/codec/encoder/core/src/encoder_ext.cpp
+++ b/codec/encoder/core/src/encoder_ext.cpp
@@ -2085,8 +2085,7 @@ int32_t WelsInitEncoderExt (sWelsEncCtx** ppCtx, SWelsSvcCodingParam* pCodingPar
   if (wlog == WelsLogDefault) {
     str_t fname[MAX_FNAME_LEN] = {0};
 
-    WelsSnprintf (fname, MAX_FNAME_LEN, "%swels_svc_encoder_trace.txt",
-                  pCodingParam->sTracePath);		// confirmed_safe_unsafe_usage
+    WelsSnprintf (fname, MAX_FNAME_LEN, "wels_svc_encoder_trace.txt");
 
 
     pCtx->pFileLog	= WelsFopen (fname, "wt+");
diff --git a/codec/encoder/core/src/slice_multi_threading.cpp b/codec/encoder/core/src/slice_multi_threading.cpp
index 84d6e95e..9e5750ab 100644
--- a/codec/encoder/core/src/slice_multi_threading.cpp
+++ b/codec/encoder/core/src/slice_multi_threading.cpp
@@ -428,11 +428,7 @@ int32_t RequestMtResource (sWelsEncCtx** ppCtx, SWelsSvcCodingParam* pCodingPara
     fclose (pSmt->pFSliceDiff);
     pSmt->pFSliceDiff = NULL;
   }
-#ifdef _WIN32
-  pSmt->pFSliceDiff	= fopen (".\\slice_time.txt", "wt+");
-#else
-  pSmt->pFSliceDiff	= fopen ("/tmp/slice_time.txt", "wt+");
-#endif//_WIN32
+  pSmt->pFSliceDiff	= fopen ("slice_time.txt", "wt+");
 #endif//MT_DEBUG
 
 #if defined(ENABLE_TRACE_MT)
diff --git a/codec/encoder/core/src/utils.cpp b/codec/encoder/core/src/utils.cpp
index 0a56a596..cc30cfc6 100644
--- a/codec/encoder/core/src/utils.cpp
+++ b/codec/encoder/core/src/utils.cpp
@@ -264,7 +264,6 @@ void WelsReopenTraceFile (void* pCtx, str_t* pCurPath) {
 #ifdef ENABLE_TRACE_FILE
   sWelsEncCtx* pEncCtx	= (sWelsEncCtx*)pCtx;
   if (wlog == WelsLogDefault) {
-    str_t strTraceFile[MAX_FNAME_LEN] = {0};
     int32_t len = 0;
     if (pEncCtx->pFileLog != NULL) {
       WelsFclose (pEncCtx->pFileLog);
@@ -274,14 +273,7 @@ void WelsReopenTraceFile (void* pCtx, str_t* pCurPath) {
     len = STRNLEN (pCurPath, MAX_FNAME_LEN - 1);	// confirmed_safe_unsafe_usage
     if (len >= MAX_FNAME_LEN)
       return;
-    STRNCPY (strTraceFile, MAX_FNAME_LEN, pCurPath, len);	// confirmed_safe_unsafe_usage
-#ifdef __GNUC__
-    STRCAT (strTraceFile, MAX_FNAME_LEN - len, "/wels_encoder_trace.txt");	// confirmed_safe_unsafe_usage
-#elif _WIN32
-    STRCAT (strTraceFile, MAX_FNAME_LEN - len, "\\wels_encoder_trace.txt"); // confirmed_safe_unsafe_usage
-#else
-#endif//__GNUC__
-    pEncCtx->pFileLog	= WelsFopen (strTraceFile, "wt+");	// confirmed_safe_unsafe_usage
+    pEncCtx->pFileLog	= WelsFopen ("wels_encoder_trace.txt", "wt+");	// confirmed_safe_unsafe_usage
   }
 #endif//ENABLE_TRACE_FILE
 }
diff --git a/codec/encoder/plus/src/welsEncoderExt.cpp b/codec/encoder/plus/src/welsEncoderExt.cpp
index 8689e135..ae89fd8c 100644
--- a/codec/encoder/plus/src/welsEncoderExt.cpp
+++ b/codec/encoder/plus/src/welsEncoderExt.cpp
@@ -407,20 +407,6 @@ int CWelsH264SVCEncoder::Initialize2 (void* argv, const INIT_TYPE iInitType) {
     InitPic (m_pSrcPicList[i], iColorspace, m_iMaxPicWidth, m_iMaxPicHeight);
   }
 
-#if defined(OUTPUT_BIT_STREAM) || defined(ENABLE_TRACE_FILE)
-  str_t fpath[MAX_FNAME_LEN] = {0};
-#if defined(__GNUC__)
-  WelsSnprintf (fpath, MAX_FNAME_LEN, "/tmp/");		// confirmed_safe_unsafe_usage
-
-#else//__GNUC__
-
-  WelsSnprintf (fpath, MAX_FNAME_LEN, ".\\");		// confirmed_safe_unsafe_usage
-#endif //__GNUC__
-
-  strcpy (pCfg->sTracePath, fpath);		// confirmed_safe_unsafe_usage
-
-#endif //#if defined(OUTPUT_BIT_STREAM) || defined(ENABLE_TRACE_FILE)
-
   if (WelsInitEncoderExt (&m_pEncContext, pCfg)) {
     WelsLog (m_pEncContext, WELS_LOG_ERROR, "CWelsH264SVCEncoder::Initialize(), WelsInitEncoderExt failed.\n");
     Uninitialize();