diff --git a/src/libnffile/nfxV3.h b/src/libnffile/nfxV3.h
index ede76a56..9ceee663 100755
--- a/src/libnffile/nfxV3.h
+++ b/src/libnffile/nfxV3.h
@@ -591,6 +591,8 @@ typedef struct EXinmonMeta_s {
 #define EXinmonMetaID 34
     uint16_t frameSize;
     uint16_t linkType;
+    // uint16_t etherType;
+    // uint16_t fill;
 } EXinmonMeta_t;
 #define OFFframeSize offsetof(EXinmonMeta_t, frameSize)
 #define SIZEframeSize MemberSize(EXinmonMeta_t, frameSize)
@@ -660,8 +662,6 @@ typedef struct EXdot1q_s {
 
 typedef struct EXphysicalInterface_s {
 #define EXphysicalInterfaceID 39
-    uint16_t etherType;
-    uint16_t fill;
     uint32_t ingress;
     uint32_t egress;
 #define OFFphysIngress offsetof(EXphysicalInterface_t, ingress)
diff --git a/src/nfanon/nfanon.c b/src/nfanon/nfanon.c
index c17fb3b1..60948bda 100755
--- a/src/nfanon/nfanon.c
+++ b/src/nfanon/nfanon.c
@@ -62,7 +62,7 @@
 typedef struct worker_param_s {
     int self;
     int numWorkers;
-    dataBlock_t *dataBlock;
+    dataBlock_t **dataBlock;
 
     // sync barrier
     pthread_barrier_t *barrier;
@@ -259,6 +259,13 @@ static void process_data(char *wfile, int verbose, worker_param_t **workerList,
     pthread_controller_wait(barrier);
 
     dataBlock_t *dataBlock = NULL;
+    // map datablock for workers - all workers
+    // process thesame block but different records
+    for (int i = 0; i < numWorkers; i++) {
+        // set new datablock for all workers
+        workerList[i]->dataBlock = &dataBlock;
+    }
+
     int blk_count = 0;
     int done = 0;
     while (!done) {
@@ -322,10 +329,6 @@ static void process_data(char *wfile, int verbose, worker_param_t **workerList,
         }
 
         dbg_printf("Next block: %d, Records: %u\n", blk_count, dataBlock->NumRecords);
-        for (int i = 0; i < numWorkers; i++) {
-            // set new datablock for all workers
-            workerList[i]->dataBlock = dataBlock;
-        }
         // release workers from barrier
         pthread_barrier_release(barrier);
 
@@ -338,10 +341,7 @@ static void process_data(char *wfile, int verbose, worker_param_t **workerList,
     }  // while
 
     // done! - signal all workers to terminate
-    for (int i = 0; i < numWorkers; i++) {
-        // set NULL datablock to trigger workers to exit.
-        workerList[i]->dataBlock = NULL;
-    }
+    dataBlock = NULL;
     pthread_barrier_release(barrier);
 
     FreeDataBlock(dataBlock);
@@ -361,8 +361,8 @@ __attribute__((noreturn)) static void *worker(void *arg) {
     // wait in barrier after launch
     pthread_barrier_wait(worker_param->barrier);
 
-    while (worker_param->dataBlock) {
-        dataBlock_t *dataBlock = worker_param->dataBlock;
+    while (*(worker_param->dataBlock)) {
+        dataBlock_t *dataBlock = *(worker_param->dataBlock);
         dbg_printf("Worker %i working on %p\n", self, dataBlock);
 
         uint32_t recordCount = 0;
@@ -372,7 +372,7 @@ __attribute__((noreturn)) static void *worker(void *arg) {
         for (int i = 0; i < dataBlock->NumRecords; i++) {
             if ((sumSize + record_ptr->size) > dataBlock->size || (record_ptr->size < sizeof(record_header_t))) {
                 LogError("Corrupt data file. Inconsistent block size in %s line %d\n", __FILE__, __LINE__);
-                exit(255);
+                goto SKIP;
             }
             sumSize += record_ptr->size;
 
@@ -405,6 +405,7 @@ __attribute__((noreturn)) static void *worker(void *arg) {
 
         dbg_printf("Worker %i: datablock completed. Records processed: %u\n", self, recordCount);
 
+    SKIP:
         // Done
         // wait in barrier for next data record
         pthread_barrier_wait(worker_param->barrier);
@@ -464,7 +465,7 @@ int main(int argc, char **argv) {
     int numWorkers = MAXANONWORKERS;
     int verbose = 1;
     int c;
-    while ((c = getopt(argc, argv, "hK:L:qr:w:")) != EOF) {
+    while ((c = getopt(argc, argv, "hK:L:qr:t:w:")) != EOF) {
         switch (c) {
             case 'h':
                 usage(argv[0]);