diff --git a/src/ArbitragerImpl.ts b/src/ArbitragerImpl.ts
index eeccce71..533c7ac6 100644
--- a/src/ArbitragerImpl.ts
+++ b/src/ArbitragerImpl.ts
@@ -101,12 +101,16 @@ export default class ArbitragerImpl implements Arbitrager {
     }
 
     this.log.info(t('FoundArbitrageOppotunity'));
-    this.log.info(t('SendingOrderTargettingQuote'), bestAsk);
-    await this.sendOrder(bestAsk, targetVolume, OrderType.Limit);
-    this.log.info(t('SendingOrderTargettingQuote'), bestBid);
-    await this.sendOrder(bestBid, targetVolume, OrderType.Limit);
-    this.status = 'Sent';
-    await this.checkOrderState();
+    try {
+      await this.sendOrder(bestAsk, targetVolume, OrderType.Limit);
+      await this.sendOrder(bestBid, targetVolume, OrderType.Limit);
+      this.status = 'Sent';
+      await this.checkOrderState();
+    } catch (ex) {
+      this.log.error(ex.message);
+      this.log.debug(ex.stack);
+      this.status = 'Order send/refresh failed';
+    }
     this.log.info(t('SleepingAfterSend'), config.sleepAfterSend);
     this.activeOrders = [];
     await delay(config.sleepAfterSend);
@@ -189,6 +193,7 @@ export default class ArbitragerImpl implements Arbitrager {
   }
 
   private async sendOrder(quote: Quote, targetVolume: number, orderType: OrderType): Promise<void> {
+    this.log.info(t('SendingOrderTargettingQuote'), quote);
     const brokerConfig = _.find(this.configStore.config.brokers,
       x => x.broker === quote.broker) as BrokerConfig;
     const orderSide = quote.side === QuoteSide.Ask ? OrderSide.Buy : OrderSide.Sell;
diff --git a/src/PositionServiceImpl.ts b/src/PositionServiceImpl.ts
index 8dc2290a..9e0013f2 100644
--- a/src/PositionServiceImpl.ts
+++ b/src/PositionServiceImpl.ts
@@ -87,6 +87,9 @@ export default class PositionServiceImpl implements PositionService {
           return pos;
         });
       this._positionMap = _(await Promise.all(promises)).map(p => [p.broker, p]).fromPairs().value();
+    } catch (ex) {
+      this.log.error(ex.message);
+      this.log.debug(ex.stack);
     } finally {
       this.isRefreshing = false;
       this.log.debug('Finished refresh.');
diff --git a/src/__tests__/ArbitragerImpl.test.ts b/src/__tests__/ArbitragerImpl.test.ts
index 1e74b76c..f06a4f33 100644
--- a/src/__tests__/ArbitragerImpl.test.ts
+++ b/src/__tests__/ArbitragerImpl.test.ts
@@ -303,6 +303,27 @@ describe('Arbitrager', () => {
     expect(arbitrager.status).toBe('MaxRetryCount breached');
   });
 
+  test('Send throws', async () => {
+    config.maxRetryCount = 3;
+    spreadAnalyzer.analyze.mockImplementation(() => {
+      return {
+        bestBid: new Quote(Broker.Quoine, QuoteSide.Bid, 600, 4),
+        bestAsk: new Quote(Broker.Coincheck, QuoteSide.Ask, 500, 1),
+        invertedSpread: 100,
+        availableVolume: 1,
+        targetVolume: 1,
+        targetProfit: 100
+      };
+    });
+    baRouter.send = () => { throw new Error('Mock refresh error.'); };
+    const arbitrager = new ArbitragerImpl(quoteAggregator, configStore,
+      positionService, baRouter, spreadAnalyzer);
+    positionService.isStarted = true;
+    await arbitrager.start();
+    await quoteAggregator.onQuoteUpdated([]);
+    expect(arbitrager.status).toBe('Order send/refresh failed');
+  });
+
   test('Send and refresh throws', async () => {
     config.maxRetryCount = 3;
     spreadAnalyzer.analyze.mockImplementation(() => {
diff --git a/src/__tests__/PositionServiceImpl.test.ts b/src/__tests__/PositionServiceImpl.test.ts
index e9b49a17..eafb4b07 100644
--- a/src/__tests__/PositionServiceImpl.test.ts
+++ b/src/__tests__/PositionServiceImpl.test.ts
@@ -50,6 +50,16 @@ describe('Position Service', () => {
     expect(qPos.allowedShortSize).toBe(0.2);
   });
 
+  test('positions throws', async () => {
+    const baRouterThrows = { getBtcPosition: async () => { throw new Error('Mock refresh error.'); } };
+    const ps = new PositionServiceImpl(configStore, baRouterThrows);
+    ps.print();
+    await ps.start();
+    expect(ps.positionMap).toBeUndefined();
+    expect(ps.netExposure).toBe(0);
+    await ps.stop();
+  });
+
   test('positions smaller than minSize', async () => {
     const baRouter = {
       getBtcPosition: broker => broker === Broker.Quoine ? 0.000002 : -0.3
diff --git a/src/stringResources.ts b/src/stringResources.ts
index 103f6e47..49550800 100644
--- a/src/stringResources.ts
+++ b/src/stringResources.ts
@@ -1,3 +1,4 @@
+// tslint:disable:max-line-length
 export const en = {
   ArbitragerThreadHasBeenStopped: 'Arbitrager thread has been stopped. Please hit Enter to close this window.',
   AtLeastTwoBrokersMustBeEnabled: 'At least two brokers must be enabled.',
@@ -10,7 +11,7 @@ export const en = {
   BuyLegIsNotFilledYetPendingSizeIs: '>>Buy leg is not filled yet. Pending size is %s.',
   CheckingIfBothLegsAreDoneOrNot: '>>Checking if both legs are done or not...',
   ExpectedProfit: 'Expected profit',
-  FailedToGetASpreadAnalysisResult: 'Failed to get a spread analysis result. %s',
+  FailedToGetASpreadAnalysisResult: 'Failed to get a spread analysis result. Check maxLongPosition and maxShortPosition in the broker configs. %s',
   FoundArbitrageOppotunity: '>>Found arbitrage oppotunity.',
   FoundInvertedQuotes: 'Found inverted quotes.',
   LongAllowed: 'LongAllowed',
@@ -53,7 +54,7 @@ export const ja = {
   BuyLegIsNotFilledYetPendingSizeIs: '>>買いオーダー未約定。残り数量%s',
   CheckingIfBothLegsAreDoneOrNot: '>>両方のオーダーが約定したか確認中...',
   ExpectedProfit: '予想収益　　',
-  FailedToGetASpreadAnalysisResult: 'スプレッド解析結果の取得に失敗しました。 %s',
+  FailedToGetASpreadAnalysisResult: 'スプレッド解析結果の取得に失敗しました。取引所設定のmaxLongPosition, maxShortPositionが十分に大きいか確認してください。 %s',
   FoundArbitrageOppotunity: '>>裁定機会を発見。',
   FoundInvertedQuotes: 'スプレッドの逆転を発見。',
   LongAllowed: '買い試行許可',