diff --git a/met/src/tools/other/ioda2nc/ioda2nc.cc b/met/src/tools/other/ioda2nc/ioda2nc.cc
index 04c58c0909..3b0da9288c 100644
--- a/met/src/tools/other/ioda2nc/ioda2nc.cc
+++ b/met/src/tools/other/ioda2nc/ioda2nc.cc
@@ -59,6 +59,8 @@ static const char * DEF_CONFIG_NAME = "MET_BASE/config/IODA2NCConfig_default";
 
 static const char *program_name = "ioda2nc";
 
+static const int REJECT_DEBUG_LEVEL = 9;
+
 ////////////////////////////////////////////////////////////////////////
 
 //
@@ -662,7 +664,6 @@ void process_ioda_file(int i_pb) {
       if(has_msg_type) {
          int buf_len = sizeof(modified_hdr_typ);
          m_strncpy(hdr_typ, hdr_msg_types+(i_read*nstring), nstring, method_name, "hdr_typ");
-         hdr_typ[nstring] = 0;
          // Null terminate the message type string
          cleanup_hdr_buf(hdr_typ, nstring);
 
@@ -692,7 +693,6 @@ void process_ioda_file(int i_pb) {
       if(has_station_id) {
          char tmp_sid[nstring+1];
          m_strncpy(tmp_sid, hdr_station_ids+(i_read*nstring), nstring, method_name, "tmp_sid");
-         tmp_sid[nstring] = 0;
          cleanup_hdr_buf(tmp_sid, nstring);
          hdr_sid = tmp_sid;
       }
@@ -990,7 +990,9 @@ static void cleanup_hdr_buf(char *hdr_buf, int buf_len) {
    int i;
    hdr_buf[buf_len] = '\0';
    // Change the trailing blank space to a null
-   for(i=buf_len-1; i>=0; i--) {
+   int str_len = m_strlen(hdr_buf);
+   if (buf_len <= str_len) str_len = buf_len;
+   for(i=str_len-1; i>=0; i--) {
       if(' ' == hdr_buf[i]) {
          hdr_buf[i] = '\0';
          if(i > 0 && ' ' != hdr_buf[i-1]) break;
@@ -1001,10 +1003,12 @@ static void cleanup_hdr_buf(char *hdr_buf, int buf_len) {
 ////////////////////////////////////////////////////////////////////////
 
 bool keep_message_type(const char *mt_str) {
-   bool keep = false;
+   bool keep = conf_info.message_type.n_elements() == 0 ||
+               conf_info.message_type.has(mt_str, false);
 
-   keep = conf_info.message_type.n_elements() == 0 ||
-          conf_info.message_type.has(mt_str, false);
+   if(!keep && mlog.verbosity_level() >= REJECT_DEBUG_LEVEL) {
+      mlog << Debug(REJECT_DEBUG_LEVEL) << "The message type [" << mt_str << "] is rejected\n";
+   }
 
    return(keep);
 }
@@ -1013,8 +1017,14 @@ bool keep_message_type(const char *mt_str) {
 
 bool keep_station_id(const char *sid_str) {
 
-   return(conf_info.station_id.n_elements() == 0 ||
-          conf_info.station_id.has(sid_str, false));
+   bool keep = (conf_info.station_id.n_elements() == 0 ||
+                conf_info.station_id.has(sid_str, false));
+
+   if(!keep && mlog.verbosity_level() >= REJECT_DEBUG_LEVEL) {
+      mlog << Debug(REJECT_DEBUG_LEVEL) << "The station ID [" << sid_str << "] is rejected\n";
+   }
+
+   return(keep);
 }
 
 ////////////////////////////////////////////////////////////////////////
@@ -1036,6 +1046,11 @@ bool keep_valid_time(const unixtime ut,
       if(ut > max_ut) keep = false;
    }
 
+   if(!keep && mlog.verbosity_level() >= REJECT_DEBUG_LEVEL) {
+      mlog << Debug(REJECT_DEBUG_LEVEL) << "The valid_time [" << ut << ", "
+           << unix_to_yyyymmdd_hhmmss(ut) << "] is rejected\n";
+   }
+
    return(keep);
 }