diff --git a/iguana/iguana_blocks.c b/iguana/iguana_blocks.c
index 93a993063..7ff74e3e8 100755
--- a/iguana/iguana_blocks.c
+++ b/iguana/iguana_blocks.c
@@ -203,39 +203,35 @@ void _iguana_blocklink(struct iguana_info *coin,struct iguana_block *prev,struct
 struct iguana_block *iguana_blockhashset(char *debugstr,struct iguana_info *coin,int32_t height,bits256 hash2,int32_t createflag)
 {
     struct iguana_block *block,*prev; int32_t size;
-    /*if ( height > 0 && height > coin->blocks.maxbits )
-    {
-        printf("%s: illegal height.%d when max.%d, or nonz depth.%d\n",debugstr,height,coin->blocks.maxbits,coin->blockdepth);
-        //getchar();
-        return(0);
-    }*/
-    while ( coin->blockdepth > 0 )
+    /*while ( coin->blockdepth > 0 )
     {
         usleep(100000);
         if ( coin->blockdepth > 0 )
             printf("A %s >>>>>>>>>> OK only if rare %s blockhashset.%d depth.%d\n",coin->symbol,debugstr,height,coin->blockdepth);
         //fprintf(stderr,">>>>>>>>>> OK only if rare %s blockhashset.%d depth.%d\n",debugstr,height,depth);
         //printf("%d\n",1/(1 - depth/depth));
-    }
+    }*/
+    portable_mutex_lock(&coin->blocks_mutex);
     coin->blockdepth++;
     HASH_FIND(hh,coin->blocks.hash,&hash2,sizeof(hash2),block);
     if ( block != 0 )
     {
         if ( coin->blockdepth > 0 )
             coin->blockdepth--;
-        while ( coin->blockdepth > 0 )
+        /*while ( coin->blockdepth > 0 )
         {
             usleep(100000);
             if ( coin->blockdepth > 0 )
                 printf("B %s >>>>>>>>>> OK only if rare %s match blockhashset.%d depth.%d\n",coin->symbol,debugstr,height,coin->blockdepth);
             //fprintf(stderr,">>>>>>>>>> OK only if rare%s match blockhashset.%d depth.%d\n",debugstr,height,depth);
             //printf("%d\n",1/(1 - depth/depth));
-        }
+        }*/
+        portable_mutex_unlock(&coin->blocks_mutex);
         return(block);
     }
     if ( createflag > 0 )
     {
-        portable_mutex_lock(&coin->blocks_mutex);
+        //portable_mutex_lock(&coin->blocks_mutex);
         size = (int32_t)((coin->chain->zcash != 0) ? sizeof(struct iguana_zblock) : sizeof(struct iguana_block));
         block = calloc(1,size);
         block->RO.hash2 = hash2;
@@ -261,18 +257,19 @@ struct iguana_block *iguana_blockhashset(char *debugstr,struct iguana_info *coin
             if ( tmp != block )
                 printf("%s height.%d search error %p != %p\n",str,height,block,tmp);
         }
-        portable_mutex_unlock(&coin->blocks_mutex);
+        //portable_mutex_unlock(&coin->blocks_mutex);
     }
     if ( coin->blockdepth > 0 )
         coin->blockdepth--;
-    while ( coin->blockdepth > 0 )
+    portable_mutex_unlock(&coin->blocks_mutex);
+    /* while ( coin->blockdepth > 0 )
     {
         usleep(100000);
         if ( coin->blockdepth > 0 )
             printf("C %s >>>>>>>>>> OK only if rare %s create blockhashset.%d depth.%d\n",coin->symbol,debugstr,height,coin->blockdepth);
         //fprintf(stderr,">>>>>>>>>> OK only if rare%s create blockhashset.%d depth.%d\n",debugstr,height,depth);
         //printf("%d\n",1/(1 - depth/depth));
-    }
+    }*/
     return(block);
 }