diff --git a/modules/blockHandler.js b/modules/blockHandler.js
index 9845f45..5e06ace 100644
--- a/modules/blockHandler.js
+++ b/modules/blockHandler.js
@@ -247,11 +247,15 @@ class BlockHandler {
 
         try {
             let blockData;
-            try {
-                blockData = JSON.parse(block.data);
-            } catch (e) {
-                logger.info('Not JSON block ' + block.index);
-                return callback();
+            if (typeof block.data ==="object") {
+                blockData = block.data;
+            } else {
+                try {
+                    blockData = JSON.parse(block.data);
+                } catch (e) {
+                    that.log('Info: Not JSON block ' + block.index);
+                    return callback();
+                }
             }
 
 
diff --git a/modules/smartContracts/EcmaContract.js b/modules/smartContracts/EcmaContract.js
index 06295c7..738b661 100644
--- a/modules/smartContracts/EcmaContract.js
+++ b/modules/smartContracts/EcmaContract.js
@@ -1474,7 +1474,16 @@ class EcmaContract {
             that.blockchain.generateNextBlockAuto(callBlock, function (generatedBlock) {
 
                 that.events._handleBlockReplay(generatedBlock.index, function () {
-                    that._handleBlock(JSON.parse(generatedBlock.data), generatedBlock, true, (err) => {
+                    //console.log(generatedBlock.data);
+                    let generatedBlockData = generatedBlock.data;
+                    if (typeof generatedBlockData !== "object"){
+                        try {
+                            generatedBlockData = JSON.parse(generatedBlock.data)
+                        } catch (e) {
+                            assert.assert(false, e.toString());
+                        }
+                    }
+                    that._handleBlock(generatedBlock.data, generatedBlock, true, (err) => {
                         if(err) {
                             cb(err);
                             return;
@@ -1634,7 +1643,6 @@ class EcmaContract {
     _handleContractDeploy(address, code, state, block, callback) {
         let that = this;
 
-
         /**
          * Initiate and run contract
          */
@@ -1643,7 +1651,7 @@ class EcmaContract {
             state.block = block;
             state.contractAddress = address;
             let contract = {code: code, state: state};
-
+            
             that.contracts.put(address, JSON.stringify(contract), function (err) {
                 if(err) {
                     logger.error('Contract deploy handling error');
@@ -1799,10 +1807,15 @@ class EcmaContract {
         let verifyBlock = {};
         let testWallet = new Wallet(false, that.config);
 
+        //exclude circullar links
+        let blockState={};
+        Object.assign(blockState, blockData.state);
 
         switch (blockData.type) {
             case EcmaContractDeployBlock.blockType:
 
+
+
                 verifyBlock = new EcmaContractDeployBlock(blockData.ecmaCode, blockData.state);
 
                 if(verifyBlock.data !== blockData.data) {
@@ -1819,10 +1832,11 @@ class EcmaContract {
                     return
                 }
 
-                this._handleContractDeploy(block.index, blockData.ecmaCode, blockData.state, block, callback);
+                this._handleContractDeploy(block.index, blockData.ecmaCode, blockState, block, callback);
                 break;
 
             case EcmaContractCallBlock.blockType:
+
                 verifyBlock = new EcmaContractCallBlock(blockData.address, blockData.method, blockData.args, blockData.state);
                 if(verifyBlock.data !== blockData.data) {
                     logger.error('Contract invalid data in block ' + block.index);
@@ -1838,7 +1852,7 @@ class EcmaContract {
                     return
                 }
 
-                this._handleContractCall(blockData.address, blockData.method, blockData.args, blockData.state, block, testOnly, callback);
+                this._handleContractCall(blockData.address, blockData.method, blockData.args, blockState, block, testOnly, callback);
 
                 break;
             default:
diff --git a/modules/validators/dlcpoa.js b/modules/validators/dlcpoa.js
index 327a9b9..f8077a1 100644
--- a/modules/validators/dlcpoa.js
+++ b/modules/validators/dlcpoa.js
@@ -132,8 +132,18 @@ function generateNextBlock(blockData, cb, cancelCondition) {
     /*if(miningNow) {
      return;
      }*/
+    /*
     if(typeof blockData === 'object') {
         blockData = JSON.stringify(blockData);
+    }*/
+
+    if (typeof blockData !== 'object') {
+        try {
+            blockData = JSON.parse(blockData);
+        } catch (e) {
+            console.log('Info: Error in block data.');
+            return false;
+        }
     }
 
     /*if(blockchain.config.program.disableMining){
diff --git a/modules/validators/lcpoa.js b/modules/validators/lcpoa.js
index 8b45ec3..e93d895 100644
--- a/modules/validators/lcpoa.js
+++ b/modules/validators/lcpoa.js
@@ -84,8 +84,17 @@ function generateNextBlock(blockData, cb, cancelCondition) {
     /*if(miningNow) {
      return;
      }*/
-    if(typeof blockData === 'object') {
+    /*if(typeof blockData === 'object') {
         blockData = JSON.stringify(blockData);
+    }*/
+
+    if (typeof blockData !== 'object') {
+        try {
+            blockData = JSON.parse(blockData);
+        } catch (e) {
+            console.log('Info: Error in block data.');
+            return false;
+        }
     }
 
     /*if(blockchain.config.program.disableMining){
diff --git a/modules/validators/thrusted.js b/modules/validators/thrusted.js
index 5036ca4..036a679 100644
--- a/modules/validators/thrusted.js
+++ b/modules/validators/thrusted.js
@@ -183,8 +183,16 @@ function generateNextBlock(blockData, cb, cancelCondition, timestamp) {
         return false;
     }
 
-    if(typeof blockData === 'object') {
+    /*if(typeof blockData === 'object') {
         blockData = JSON.stringify(blockData);
+    }*/
+    if (typeof blockData !== 'object') {
+        try {
+            blockData = JSON.parse(blockData);
+        } catch (e) {
+            console.log('Info: Error in block data.');
+            return false;
+        }
     }
 
     blockchain.getLatestBlock(function (previousBlock) {