diff --git a/iguana/dpow/dpow_network.c b/iguana/dpow/dpow_network.c
index 76994cb2e..6dfd8ca3d 100755
--- a/iguana/dpow/dpow_network.c
+++ b/iguana/dpow/dpow_network.c
@@ -228,14 +228,17 @@ char *_dex_reqsend(struct supernet_info *myinfo,char *handler,uint8_t *data,int3
 void dpow_randipbits(struct supernet_info *myinfo,struct iguana_info *coin,cJSON *retjson)
 {
     int32_t m; uint32_t ipbits; char *coinstr;
-    if ( (m= myinfo->numdpowipbits) > 0 )
+    if ( is_cJSON_Array(retjson) == 0 )
     {
-        ipbits = myinfo->dpowipbits[(uint32_t)rand() % m];
-        jaddnum(retjson,"randipbits",ipbits);
-        //printf("add randipbits.%08x\n",ipbits);
+        if ( (m= myinfo->numdpowipbits) > 0 )
+        {
+            ipbits = myinfo->dpowipbits[(uint32_t)rand() % m];
+            jaddnum(retjson,"randipbits",ipbits);
+            //printf("add randipbits.%08x\n",ipbits);
+        }
+        if ( (coinstr= jstr(retjson,"coin")) == 0 )
+            jaddstr(retjson,"coin",coin->symbol);
     }
-    if ( (coinstr= jstr(retjson,"coin")) == 0 )
-        jaddstr(retjson,"coin",coin->symbol);
 }
 
 char *dex_response(int32_t *broadcastflagp,struct supernet_info *myinfo,struct dex_nanomsghdr *dexp)
@@ -377,7 +380,7 @@ char *dex_reqsend(struct supernet_info *myinfo,char *handler,uint8_t *data,int32
     {
         if ( (retstrs[j]= _dex_reqsend(myinfo,handler,data,datalen)) != 0 )
         {
-            if ( strncmp(retstrs[j],"{\"error\":\"null return\"}",strlen("{\"error\":\"null return\"}")) != 0 )
+            if ( strncmp(retstrs[j],"{\"error\":\"null return\"}",strlen("{\"error\":\"null return\"}")) != 0 && strncmp(retstrs[j],"[]",strlen("[]")) != 0 )
             {
                 if ( ++j == M )
                     break;
diff --git a/iguana/tests/dexlisttransactions b/iguana/tests/dexlisttransactions
index 2db8fd18e..3dbc78aa6 100755
--- a/iguana/tests/dexlisttransactions
+++ b/iguana/tests/dexlisttransactions
@@ -1,2 +1,5 @@
 #!/bin/bash
-curl --url "http://127.0.0.1:7778" --data "{\"agent\":\"dex\",\"method\":\"listtransactions\",\"address\":\"15R3C2ZKmak5pCc4duLY2jLtFD3o1jaeNd\",\"count\":100,\"skip\":0,\"symbol\":\"BTC\"}"
+curl --url "http://127.0.0.1:7778" --data "{\"agent\":\"dex\",\"method\":\"listtransactions\",\"address\":\"RRyBxbrAPRUBCUpiJgJZYrkxqrh8x5ta9Z\",\"count\":100,\"skip\":0,\"symbol\":\"USD\"}"
+curl --url "http://127.0.0.1:7778" --data "{\"agent\":\"dex\",\"method\":\"listtransactions\",\"address\":\"RRyBxbrAPRUBCUpiJgJZYrkxqrh8x5ta9Z\",\"count\":100,\"skip\":0,\"symbol\":\"MVP\"}"
+curl --url "http://127.0.0.1:7778" --data "{\"agent\":\"dex\",\"method\":\"listtransactions\",\"address\":\"RMGpGoX82M1ZUUbHxZ3JKHacxY9NYVakqr\",\"count\":100,\"skip\":0,\"symbol\":\"USD\"}"
+curl --url "http://127.0.0.1:7778" --data "{\"agent\":\"dex\",\"method\":\"listtransactions\",\"address\":\"RMGpGoX82M1ZUUbHxZ3JKHacxY9NYVakqr\",\"count\":100,\"skip\":0,\"symbol\":\"MVP\"}"