diff --git a/asset-transfer-basic/chaincode-javascript/lib/assetTransfer.js b/asset-transfer-basic/chaincode-javascript/lib/assetTransfer.js
index a68b75c6..d50554fc 100644
--- a/asset-transfer-basic/chaincode-javascript/lib/assetTransfer.js
+++ b/asset-transfer-basic/chaincode-javascript/lib/assetTransfer.js
@@ -79,9 +79,9 @@ class AssetTransfer extends Contract {
         const asset = {
             ID: id,
             Color: color,
-            Size: size,
+            Size: Number(size),
             Owner: owner,
-            AppraisedValue: appraisedValue,
+            AppraisedValue: Number(appraisedValue),
         };
         // we insert data in alphabetic order using 'json-stringify-deterministic' and 'sort-keys-recursive'
         await ctx.stub.putState(id, Buffer.from(stringify(sortKeysRecursive(asset))));
diff --git a/off_chain_data/application-go/app.go b/off_chain_data/application-go/app.go
index fa49de02..4469df2c 100644
--- a/off_chain_data/application-go/app.go
+++ b/off_chain_data/application-go/app.go
@@ -39,6 +39,11 @@ func main() {
 		command := allCommands[name]
 
 		if err := command(client); err != nil {
+			if errors.Is(err, errExpected) {
+				fmt.Println(err)
+				return
+			}
+
 			panic(err)
 		}
 	}
diff --git a/off_chain_data/application-go/store.go b/off_chain_data/application-go/store.go
index ccc90e5d..704e7632 100644
--- a/off_chain_data/application-go/store.go
+++ b/off_chain_data/application-go/store.go
@@ -14,7 +14,7 @@ var simulatedFailureCount = getSimulatedFailureCount()
 var transactionCount uint = 0 // Used only to simulate failures
 
 // Apply writes for a given transaction to off-chain data store, ideally in a single operation for fault tolerance.
-type writer = func(data ledgerUpdate) error
+type writer = func(ledgerUpdate) error
 
 // Ledger update made by a specific transaction.
 type ledgerUpdate struct {
@@ -71,10 +71,12 @@ func applyWritesToOffChainStore(data ledgerUpdate) error {
 	return nil
 }
 
+var errExpected = errors.New("expected error: simulated write failure")
+
 func simulateFailureIfRequired() error {
 	if simulatedFailureCount > 0 && transactionCount >= simulatedFailureCount {
 		transactionCount = 0
-		return errors.New("expected error: simulated write failure")
+		return errExpected
 	}
 
 	transactionCount += 1