diff --git a/iguana/iguana777.h b/iguana/iguana777.h
index 3e767bc14..731352bd1 100755
--- a/iguana/iguana777.h
+++ b/iguana/iguana777.h
@@ -621,7 +621,7 @@ long iguana_ramchain_data(struct iguana_info *coin,struct iguana_peer *addr,stru
 int32_t iguana_bundlehash2add(struct iguana_info *coin,struct iguana_block **blockp,struct iguana_bundle *bp,int32_t bundlei,bits256 hash2);
 struct iguana_block *iguana_bundleblockadd(struct iguana_info *coin,struct iguana_bundle **bpp,int32_t *bundleip,struct iguana_block *origblock);
 int32_t iguana_chainextend(struct iguana_info *coin,struct iguana_block *newblock);
-int32_t iguana_blockvalidate(struct iguana_info *coin,int32_t *validp,struct iguana_block *block);
+int32_t iguana_blockvalidate(struct iguana_info *coin,int32_t *validp,struct iguana_block *block,int32_t dispflag);
 char *iguana_bundledisp(struct iguana_info *coin,struct iguana_bundle *prevbp,struct iguana_bundle *bp,struct iguana_bundle *nextbp,int32_t m);
 struct iguana_bundle *iguana_bundlefind(struct iguana_info *coin,struct iguana_bundle **bpp,int32_t *bundleip,bits256 hash2);
 //int32_t iguana_chainheight(struct iguana_info *coin,struct iguana_block *origblock);
diff --git a/iguana/iguana_blocks.c b/iguana/iguana_blocks.c
index ba4ade0ae..e202ab736 100755
--- a/iguana/iguana_blocks.c
+++ b/iguana/iguana_blocks.c
@@ -130,7 +130,7 @@ struct iguana_block *iguana_blockptr(struct iguana_info *coin,int32_t height)
     return(0);
 }
 
-int32_t iguana_blockvalidate(struct iguana_info *coin,int32_t *validp,struct iguana_block *block)
+int32_t iguana_blockvalidate(struct iguana_info *coin,int32_t *validp,struct iguana_block *block,int32_t dispflag)
 {
     bits256 hash2; uint8_t serialized[sizeof(struct iguana_msgblock) + 4096];
     *validp = 0;
@@ -140,7 +140,8 @@ int32_t iguana_blockvalidate(struct iguana_info *coin,int32_t *validp,struct igu
     char str[65]; char str2[65];
     if ( *validp == 0 )
     {
-        printf("iguana_blockvalidate: miscompare (%s) vs (%s)\n",bits256_str(str,hash2),bits256_str(str2,block->RO.hash2));
+        if ( dispflag != 0 )
+            printf("iguana_blockvalidate: miscompare (%s) vs (%s)\n",bits256_str(str,hash2),bits256_str(str2,block->RO.hash2));
         return(-1);
     }
     return(0);
@@ -299,7 +300,7 @@ struct iguana_block *_iguana_chainlink(struct iguana_info *coin,struct iguana_bl
             return(0);
         }
         //char str[65]; printf("extend? %s.h%d: %.15f vs %.15f ht.%d vs %d\n",bits256_str(str,block->RO.hash2),height,block->PoW,coin->blocks.hwmchain.PoW,height,coin->blocks.hwmchain.height);
-        if ( iguana_blockvalidate(coin,&valid,newblock) < 0 || valid == 0 )
+        if ( iguana_blockvalidate(coin,&valid,newblock,1) < 0 || valid == 0 )
             return(0);
         block->height = height;
         block->valid = 1;
@@ -372,7 +373,7 @@ void iguana_blocksetheights(struct iguana_info *coin,struct iguana_block *block)
 int32_t iguana_chainextend(struct iguana_info *coin,struct iguana_block *newblock)
 {
     struct iguana_block *block,*prev; int32_t valid,oldhwm; char str[65];
-    if ( iguana_blockvalidate(coin,&valid,newblock) < 0 || valid == 0 )
+    if ( iguana_blockvalidate(coin,&valid,newblock,1) < 0 || valid == 0 )
     {
         printf("chainextend: newblock.%s didnt validate\n",bits256_str(str,newblock->RO.hash2));
         return(-1);
diff --git a/iguana/iguana_bundles.c b/iguana/iguana_bundles.c
index 2f29b5803..1b74464f7 100755
--- a/iguana/iguana_bundles.c
+++ b/iguana/iguana_bundles.c
@@ -615,7 +615,7 @@ void iguana_bundleiters(struct iguana_info *coin,struct iguana_bundle *bp,int32_
                 if ( (block= bp->blocks[i]) != 0 && block == iguana_blockfind(coin,bp->hashes[i]) )
                 {
                     //printf("(%x:%x) ",(uint32_t)block->RO.hash2.ulongs[3],(uint32_t)bp->hashes[i].ulongs[3]);
-                    if ( iguana_blockvalidate(coin,&valid,block) != 0 || (bp->bundleheight+i > 0 && bits256_nonz(block->RO.prev_block) == 0) )
+                    if ( iguana_blockvalidate(coin,&valid,block,0) != 0 || (bp->bundleheight+i > 0 && bits256_nonz(block->RO.prev_block) == 0) )
                     {
                         //char str[65]; printf(">>>>>>> null prevblock error at ht.%d patch.(%s) and reissue\n",bp->bundleheight+i,bits256_str(str,bp->hashes[i-1]));
                         block->queued = 0;
diff --git a/iguana/iguana_ramchain.c b/iguana/iguana_ramchain.c
index 534492b2e..6eb6deb4e 100755
--- a/iguana/iguana_ramchain.c
+++ b/iguana/iguana_ramchain.c
@@ -1845,7 +1845,7 @@ int32_t iguana_bundlesaveHT(struct iguana_info *coin,struct OS_memspace *mem,str
         if ( (block= bp->blocks[i]) != 0 && block == iguana_blockfind(coin,bp->hashes[i]) )
         {
             //printf("(%x:%x) ",(uint32_t)block->RO.hash2.ulongs[3],(uint32_t)bp->hashes[i].ulongs[3]);
-            if ( iguana_blockvalidate(coin,&valid,block) != 0 || (bp->bundleheight+i > 0 && bits256_nonz(block->RO.prev_block) == 0) )
+            if ( iguana_blockvalidate(coin,&valid,block,1) != 0 || (bp->bundleheight+i > 0 && bits256_nonz(block->RO.prev_block) == 0) )
             {
                 char str[65]; printf("null prevblock error at ht.%d patch.(%s)\n",bp->bundleheight+i,bits256_str(str,bp->hashes[i-1]));
                 block->queued = 0;