From 5eea3cd6d0b59963dc7c7a9e1ca597137cf3ce98 Mon Sep 17 00:00:00 2001
From: Jan Oberhauser <jan.oberhauser@gmail.com>
Date: Thu, 9 Jun 2022 13:59:52 +0200
Subject: [PATCH] fix(core): Fix issue when a node does not return data

---
 packages/core/src/WorkflowExecute.ts | 40 +++++++++++++++-------------
 1 file changed, 21 insertions(+), 19 deletions(-)

diff --git a/packages/core/src/WorkflowExecute.ts b/packages/core/src/WorkflowExecute.ts
index 79fcff4e14..3bd64566e0 100644
--- a/packages/core/src/WorkflowExecute.ts
+++ b/packages/core/src/WorkflowExecute.ts
@@ -939,26 +939,28 @@ export class WorkflowExecute {
 								workflowId: workflow.id,
 							});
 
-							// Check if the output data contains pairedItem data
-							checkOutputData: for (const outputData of nodeSuccessData as INodeExecutionData[][]) {
-								if (outputData === null) {
-									continue;
-								}
-								for (const item of outputData) {
-									if (!item.pairedItem) {
-										// The pairedItem is missing so check if it can get automatically fixed
-										if (
-											executionData.data.main.length !== 1 ||
-											executionData.data.main[0]?.length !== 1
-										) {
-											// Automatically fixing is only possible if there is only one
-											// input and one input item
-											break checkOutputData;
-										}
+							if (nodeSuccessData) {
+								// Check if the output data contains pairedItem data
+								checkOutputData: for (const outputData of nodeSuccessData) {
+									if (outputData === null) {
+										continue;
+									}
+									for (const item of outputData) {
+										if (!item.pairedItem) {
+											// The pairedItem is missing so check if it can get automatically fixed
+											if (
+												executionData.data.main.length !== 1 ||
+												executionData.data.main[0]?.length !== 1
+											) {
+												// Automatically fixing is only possible if there is only one
+												// input and one input item
+												break checkOutputData;
+											}
 
-										item.pairedItem = {
-											item: 0,
-										};
+											item.pairedItem = {
+												item: 0,
+											};
+										}
 									}
 								}
 							}