diff --git a/src/client/src/tscParseLineProtocol.c b/src/client/src/tscParseLineProtocol.c
index 939bc84e0e9d14bdbc505d9f67cda8f15f77a55c..ee65c697d6b18c5c11f79fbd9d6779f33f64c0a6 100644
--- a/src/client/src/tscParseLineProtocol.c
+++ b/src/client/src/tscParseLineProtocol.c
@@ -1677,7 +1677,7 @@ static int32_t getTimeStampValue(char *value, uint16_t len,
   if (len >= 2) {
     for (int i = 0; i < len - 2; ++i) {
       if(!isdigit(value[i])) {
-        return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+        return TSDB_CODE_TSC_INVALID_TIME_STAMP;
       }
     }
   }
@@ -1712,7 +1712,7 @@ static int32_t getTimeStampValue(char *value, uint16_t len,
       break;
     }
     default: {
-      return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+      return TSDB_CODE_TSC_INVALID_TIME_STAMP;
     }
   }
   return TSDB_CODE_SUCCESS;
@@ -1725,7 +1725,7 @@ int32_t convertSmlTimeStamp(TAOS_SML_KV *pVal, char *value,
   int64_t tsVal;
 
   if (!isTimeStamp(value, len, &type)) {
-    return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+    return TSDB_CODE_TSC_INVALID_TIME_STAMP;
   }
 
   ret = getTimeStampValue(value, len, type, &tsVal);
diff --git a/src/client/src/tscParseOpenTSDB.c b/src/client/src/tscParseOpenTSDB.c
index c89808ba01b1fe71e9bd59bd4c31e5055ffee2d4..309bbb919dd4cd853d5d8aa39e35456b1306065b 100644
--- a/src/client/src/tscParseOpenTSDB.c
+++ b/src/client/src/tscParseOpenTSDB.c
@@ -47,7 +47,7 @@ static int32_t parseTelnetMetric(TAOS_SML_DATA_POINT *pSml, const char **index,
     if (len > TSDB_TABLE_NAME_LEN) {
       tscError("OTD:0x%"PRIx64" Metric cannot exceeds 193 characters", info->id);
       tfree(pSml->stableName);
-      return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+      return TSDB_CODE_TSC_INVALID_TABLE_ID_LENGTH;
     }
 
     if (*cur == ' ') {
@@ -147,7 +147,7 @@ static int32_t parseTelnetMetricValue(TAOS_SML_KV **pKVs, int *num_kvs, const ch
     tscError("OTD:0x%"PRIx64" Failed to convert metric value string(%s) to any type",
             info->id, value);
     tfree(value);
-    return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+    return TSDB_CODE_TSC_INVALID_VALUE;
   }
   tfree(value);
 
@@ -172,7 +172,7 @@ static int32_t parseTelnetTagKey(TAOS_SML_KV *pKV, const char **index, SHashObj
   while (*cur != '\0') {
     if (len > TSDB_COL_NAME_LEN) {
       tscError("OTD:0x%"PRIx64" Tag key cannot exceeds 65 characters", info->id);
-      return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+      return TSDB_CODE_TSC_INVALID_COLUMN_LENGTH;
     }
     if (*cur == '=') {
       break;
@@ -188,7 +188,7 @@ static int32_t parseTelnetTagKey(TAOS_SML_KV *pKV, const char **index, SHashObj
   key[len] = '\0';
 
   if (checkDuplicateKey(key, pHash, info)) {
-    return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+    return TSDB_CODE_TSC_DUP_TAG_NAMES;
   }
 
   pKV->key = tcalloc(len + 1, 1);
@@ -231,7 +231,7 @@ static int32_t parseTelnetTagValue(TAOS_SML_KV *pKV, const char **index,
     //free previous alocated key field
     tfree(pKV->key);
     tfree(value);
-    return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+    return TSDB_CODE_TSC_INVALID_VALUE;
   }
   tfree(value);
 
@@ -348,14 +348,14 @@ int32_t tscParseTelnetLines(char* lines[], int numLines, SArray* points, SArray*
     if (code != TSDB_CODE_SUCCESS) {
       tscError("OTD:0x%"PRIx64" data point line parse failed. line %d : %s", info->id, i, lines[i]);
       destroySmlDataPoint(&point);
-      return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+      return code;
     } else {
       tscDebug("OTD:0x%"PRIx64" data point line parse success. line %d", info->id, i);
     }
 
     taosArrayPush(points, &point);
   }
-  return 0;
+  return TSDB_CODE_SUCCESS;
 }
 
 int taos_insert_telnet_lines(TAOS* taos, char* lines[], int numLines) {
diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index c401ab762eb7f17b075ca52ab1e9454eb136a2ab..882aca2b5259385c6c7f308d1764f8da9bea80e9 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -106,6 +106,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_TSC_DUP_COL_NAMES             TAOS_DEF_ERROR_CODE(0, 0x021D)  //"duplicated column names")
 #define TSDB_CODE_TSC_INVALID_TAG_LENGTH        TAOS_DEF_ERROR_CODE(0, 0x021E)  //"Invalid tag length")
 #define TSDB_CODE_TSC_INVALID_COLUMN_LENGTH     TAOS_DEF_ERROR_CODE(0, 0x021F)  //"Invalid column length")
+#define TSDB_CODE_TSC_DUP_TAG_NAMES             TAOS_DEF_ERROR_CODE(0, 0x0220)  //"duplicated tag names")
 
 // mnode
 #define TSDB_CODE_MND_MSG_NOT_PROCESSED         TAOS_DEF_ERROR_CODE(0, 0x0300)  //"Message not processed")
diff --git a/src/util/src/terror.c b/src/util/src/terror.c
index 311abe70df65f6090aa06b4857adb434f4d2f9a0..8fb39cd1702fe670e44f2e0db1639a0f48ab5ab0 100644
--- a/src/util/src/terror.c
+++ b/src/util/src/terror.c
@@ -112,9 +112,10 @@ TAOS_DEFINE_ERROR(TSDB_CODE_TSC_EXCEED_SQL_LIMIT,         "SQL statement too lon
 TAOS_DEFINE_ERROR(TSDB_CODE_TSC_FILE_EMPTY,               "File is empty")
 TAOS_DEFINE_ERROR(TSDB_CODE_TSC_LINE_SYNTAX_ERROR,        "Syntax error in Line")
 TAOS_DEFINE_ERROR(TSDB_CODE_TSC_NO_META_CACHED,           "No table meta cached")
-TAOS_DEFINE_ERROR(TSDB_CODE_TSC_DUP_COL_NAMES,             "duplicated column names")
-TAOS_DEFINE_ERROR(TSDB_CODE_TSC_INVALID_TAG_LENGTH,        "Invalid tag length")
-TAOS_DEFINE_ERROR(TSDB_CODE_TSC_INVALID_COLUMN_LENGTH,     "Invalid column length")
+TAOS_DEFINE_ERROR(TSDB_CODE_TSC_DUP_COL_NAMES,            "duplicated column names")
+TAOS_DEFINE_ERROR(TSDB_CODE_TSC_INVALID_TAG_LENGTH,       "Invalid tag length")
+TAOS_DEFINE_ERROR(TSDB_CODE_TSC_INVALID_COLUMN_LENGTH,    "Invalid column length")
+TAOS_DEFINE_ERROR(TSDB_CODE_TSC_DUP_TAG_NAMES,            "duplicated tag names")
 
 // mnode
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_MSG_NOT_PROCESSED,        "Message not processed")