From edfa7d8445ac922076402e3c1946307caa9adb7d Mon Sep 17 00:00:00 2001
From: Antonin Delpeuch <antonin@delpeuch.eu>
Date: Fri, 19 Apr 2019 11:25:01 +0100
Subject: [PATCH] Skip unknown operations in ApplyOperationsCommand

---
 .../google/refine/commands/history/ApplyOperationsCommand.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/main/src/com/google/refine/commands/history/ApplyOperationsCommand.java b/main/src/com/google/refine/commands/history/ApplyOperationsCommand.java
index 2ed9298be..df93d964f 100644
--- a/main/src/com/google/refine/commands/history/ApplyOperationsCommand.java
+++ b/main/src/com/google/refine/commands/history/ApplyOperationsCommand.java
@@ -45,6 +45,7 @@ import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.refine.commands.Command;
 import com.google.refine.model.AbstractOperation;
 import com.google.refine.model.Project;
+import com.google.refine.operations.UnknownOperation;
 import com.google.refine.process.Process;
 import com.google.refine.util.ParsingUtilities;
 
@@ -79,7 +80,7 @@ public class ApplyOperationsCommand extends Command {
     
     protected void reconstructOperation(Project project, ObjectNode obj) throws IOException {
         AbstractOperation operation = ParsingUtilities.mapper.convertValue(obj, AbstractOperation.class);
-        if (operation != null) {
+        if (operation != null && !(operation instanceof UnknownOperation)) {
             try {
                 Process process = operation.createProcess(project, new Properties());