diff --git a/iguana/iguana777.h b/iguana/iguana777.h
index 31c16acee..6b2445e21 100755
--- a/iguana/iguana777.h
+++ b/iguana/iguana777.h
@@ -843,7 +843,7 @@ void iguana_walletlock(struct supernet_info *myinfo);
 int32_t _SuperNET_encryptjson(char *destfname,char *passphrase,int32_t passsize,char *fname2fa,int32_t fnamesize,cJSON *argjson);
 int32_t bitcoin_pubkeylen(const uint8_t *pubkey);
 struct iguana_block *iguana_bundleblock(struct iguana_info *coin,bits256 *hash2p,struct iguana_bundle *bp,int32_t i);
-int32_t iguana_ramchainfile(struct iguana_info *coin,struct iguana_ramchain *dest,struct iguana_ramchain *R,struct iguana_bundle *bp,int32_t bundlei,struct iguana_block *block);
+void *iguana_ramchainfile(struct iguana_info *coin,struct iguana_ramchain *dest,struct iguana_ramchain *R,struct iguana_bundle *bp,int32_t bundlei,struct iguana_block *block);
 
 extern int32_t HDRnet,netBLOCKS;
 
diff --git a/iguana/iguana_ramchain.c b/iguana/iguana_ramchain.c
index 0b876bb66..6ac8e7241 100755
--- a/iguana/iguana_ramchain.c
+++ b/iguana/iguana_ramchain.c
@@ -1966,18 +1966,20 @@ int32_t iguana_oldbundlefiles(struct iguana_info *coin,uint32_t *ipbits,void **p
 
 void *iguana_bundlefile(struct iguana_info *coin,char *fname,long *filesizep,struct iguana_bundle *bp,int32_t bundlei)
 {
-    int32_t checki,hdrsi; void *ptr = 0; static bits256 zero;
+    int32_t checki,hdrsi; void *ptr = 0; struct iguana_ramchain blockR; static bits256 zero;
     *filesizep = 0;
     if ( (checki= iguana_peerfname(coin,&hdrsi,GLOBALTMPDIR,fname,0,bp->hashes[bundlei],zero,1,1)) != bundlei || bundlei < 0 || bundlei >= coin->chain->bundlesize )
     {
         printf("B iguana_ramchain_map.(%s) illegal hdrsi.%d bundlei.%d checki.%d\n",fname,hdrsi,bundlei,checki);
         return(0);
     }
-    if ( (ptr= OS_mapfile(fname,filesizep,0)) == 0 )
+    if ( (ptr= iguana_ramchainfile(coin,0,&blockR,bp,bundlei,bp->blocks[bundlei])) == 0 )
+        return(0);
+    iguana_ramchain_free(coin,&blockR,1);
+    /*if ( (ptr= OS_mapfile(fname,filesizep,0)) == 0 )
     {
         //printf("error mapping.(%s) bundlei.%d\n",fname,bundlei);
-        return(0);
-    }
+    }*/
     return(ptr);
 }
 
diff --git a/iguana/iguana_unspents.c b/iguana/iguana_unspents.c
index 7597a651b..f04b82e9d 100755
--- a/iguana/iguana_unspents.c
+++ b/iguana/iguana_unspents.c
@@ -1281,7 +1281,7 @@ void iguana_RTramchainalloc(struct iguana_info *coin,struct iguana_bundle *bp)
     }
 }
 
-int32_t iguana_ramchainfile(struct iguana_info *coin,struct iguana_ramchain *dest,struct iguana_ramchain *R,struct iguana_bundle *bp,int32_t bundlei,struct iguana_block *block)
+void *iguana_ramchainfile(struct iguana_info *coin,struct iguana_ramchain *dest,struct iguana_ramchain *R,struct iguana_bundle *bp,int32_t bundlei,struct iguana_block *block)
 {
     char fname[1024]; long filesize; int32_t err; void *ptr;
     if ( block == bp->blocks[bundlei] && (ptr= iguana_bundlefile(coin,fname,&filesize,bp,bundlei)) != 0 )
@@ -1296,12 +1296,12 @@ int32_t iguana_ramchainfile(struct iguana_info *coin,struct iguana_ramchain *des
                 char str[65];
                 printf("ERROR [%d:%d] %s vs ",bp->hdrsi,bundlei,bits256_str(str,block->RO.hash2));
                 printf("mapped.%s\n",bits256_str(str,R->H.data->firsthash2));
-                iguana_blockunmark(coin,block,bp,bundlei,1);
-                iguana_RTramchainfree(coin);
-            } else return(0);
+            } else return(ptr);
+            iguana_ramchain_free(coin,R,1);
+            iguana_blockunmark(coin,block,bp,bundlei,1);
         }
     }
-    return(-1);
+    return(0);
 }
 
 int32_t iguana_realtime_update(struct iguana_info *coin)
@@ -1324,9 +1324,11 @@ int32_t iguana_realtime_update(struct iguana_info *coin)
                 iguana_blocksetcounters(coin,block,dest);
                 B[bundlei] = block->RO;
                 double startmillis0 = OS_milliseconds(); static double totalmillis0; static int32_t num0;
-                if ( iguana_ramchainfile(coin,dest,&blockR,bp,bundlei,block) < 0 )
+                if ( iguana_ramchainfile(coin,dest,&blockR,bp,bundlei,block) == 0 )
+                {
+                    iguana_RTramchainfree(coin);
                     return(-1);
-                iguana_ramchain_free(coin,&blockR,1);
+                } else iguana_ramchain_free(coin,&blockR,1);
                 totalmillis0 += (OS_milliseconds() - startmillis0);
                 num0++;
                 printf("ramchainiterate.[%d] ave %.2f micros, total %.2f seconds\n",num0,(totalmillis0*1000.)/num0,totalmillis0/1000.);