diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..c06d8e3
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+  "[css][html][javascript][javascriptreact][json][jsonc][typescript][typescriptreact][svelte]": {
+    "editor.codeActionsOnSave": []
+  }
+}
diff --git a/aptos-tx-latency-measurement/sendtx_aptos.js b/aptos-tx-latency-measurement/sendtx_aptos.js
index 0e140ac..4cbda30 100644
--- a/aptos-tx-latency-measurement/sendtx_aptos.js
+++ b/aptos-tx-latency-measurement/sendtx_aptos.js
@@ -237,6 +237,7 @@ async function sendTx() {
   try {
     await uploadChoice(data);
   } catch (err) {
+    const now = new Date();
     sendSlackMsg(`${now}, failed to upload aptos, ${err.toString()}`);
     console.log(
       `failed to ${process.env.UPLOAD_METHOD === "AWS" ? "s3" : "gcs"}.upload!! Printing instead!`,
diff --git a/arbitrium-tx-latency-measurement/sendtx_arbitrium.js b/arbitrium-tx-latency-measurement/sendtx_arbitrium.js
index 16b2e54..d845a9e 100644
--- a/arbitrium-tx-latency-measurement/sendtx_arbitrium.js
+++ b/arbitrium-tx-latency-measurement/sendtx_arbitrium.js
@@ -270,6 +270,7 @@ async function sendTx() {
   try {
     await uploadChoice(data);
   } catch (err) {
+    const now = new Date();
     sendSlackMsg(`${now}, failed to upload arbitrium, ${err.toString()}`);
 
     console.log(
diff --git a/klaytn-tx-latency-measurement/sendtx_klaytn.js b/klaytn-tx-latency-measurement/sendtx_klaytn.js
index 0800010..e7b697c 100644
--- a/klaytn-tx-latency-measurement/sendtx_klaytn.js
+++ b/klaytn-tx-latency-measurement/sendtx_klaytn.js
@@ -128,7 +128,7 @@ async function checkBalance(addr) {
     const caver = new Caver(process.env.CAVER_URL)
     const balance = await caver.rpc.klay.getBalance(addr)
     const balanceInKLAY = caver.utils.convertFromPeb(balance, 'KLAY')
-
+    const now = new Date();
     if(parseFloat(balanceInKLAY) < parseFloat(process.env.BALANCE_ALERT_CONDITION_IN_KLAY)) {
         sendSlackMsg(`${now}, Current balance of <${process.env.SCOPE_URL}/account/${addr}|${addr}> is less than ${process.env.BALANCE_ALERT_CONDITION_IN_KLAY} KLAY! balance=${balanceInKLAY}`)
     }
diff --git a/polkadot-tx-latency-measurement/sendtx_polkadot.js b/polkadot-tx-latency-measurement/sendtx_polkadot.js
index 12dabad..1b44dff 100644
--- a/polkadot-tx-latency-measurement/sendtx_polkadot.js
+++ b/polkadot-tx-latency-measurement/sendtx_polkadot.js
@@ -181,7 +181,7 @@ async function sendTx(){
         data.resourceUsedOfLatestBlock = Math.round(weightUsed * (10**(-9)))
 
         // Create value transfer transaction.
-        const transfer = api.tx.balances.transfer(senderAddress, 0);
+        const transfer = api.tx.balances.transferAllowDeath(senderAddress, 0);
 
         // Sign transaction.
         await transfer.signAsync(sender);