Enrich contingency export error messages

src/main/java/org/gridsuite/actions/server/ContingencyListService.java

@@ -24,6 +24,7 @@
 import org.gridsuite.actions.server.entities.*;
 import org.gridsuite.actions.server.repositories.FilterBasedContingencyListRepository;
 import org.gridsuite.actions.server.repositories.IdBasedContingencyListRepository;
+import org.gridsuite.actions.server.service.DirectoryService;
 import org.gridsuite.actions.server.service.FilterService;
 import org.gridsuite.actions.server.utils.ContingencyListType;
 import org.gridsuite.actions.server.utils.ContingencyListUtils;
@@ -58,16 +59,20 @@ public class ContingencyListService {
 
     private final FilterService filterService;
 
+    private final DirectoryService directoryService;
+
     public ContingencyListService(IdBasedContingencyListRepository idBasedContingencyListRepository,
                                   FilterBasedContingencyListRepository filterBasedContingencyListRepository,
                                   NetworkStoreService networkStoreService,
                                   NotificationService notificationService,
-                                  FilterService filterService) {
+                                  FilterService filterService,
+                                  DirectoryService directoryService) {
         this.idBasedContingencyListRepository = idBasedContingencyListRepository;
         this.filterBasedContingencyListRepository = filterBasedContingencyListRepository;
         this.networkStoreService = networkStoreService;
         this.notificationService = notificationService;
         this.filterService = filterService;
+        this.directoryService = directoryService;
     }
 
     ContingencyListMetadata fromContingencyListEntity(AbstractContingencyEntity entity, ContingencyListType type) {
@@ -200,7 +205,19 @@ private List<Contingency> getContingencies(PersistentContingencyList persistentC
     @Transactional(readOnly = true)
     public List<ContingencyInfos> exportContingencyInfosList(List<UUID> ids, UUID networkUuid, String variantId) {
         Network network = getNetworkFromUuid(networkUuid, variantId);
-        return ids.stream().map(id -> evaluateContingencyList(findContingencyList(id, network), network, networkUuid, variantId)).flatMap(Collection::stream).toList();
+        return ids.stream().map(id -> {
+            try {
+                return evaluateContingencyList(findContingencyList(id, network), network, networkUuid, variantId);
+            } catch (PowsyblException powsyblEx) {
+                String contingencyListName;
+                try {
+                    contingencyListName = directoryService.getElementName(id);
+                } catch (Exception e) {
+                    contingencyListName = id.toString();
+                }
+                throw new PowsyblException("Error in contingency list: '" + contingencyListName + "': " + powsyblEx.getMessage());
+            }
+        }).flatMap(Collection::stream).toList();
     }
 
     private PersistentContingencyList findContingencyList(UUID id, Network network) {

src/main/java/org/gridsuite/actions/server/service/DirectoryService.java

@@ -0,0 +1,68 @@
+/**
+ * Copyright (c) 2026, RTE (http://www.rte-france.com)
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+package org.gridsuite.actions.server.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.HttpClientErrorException;
+import org.springframework.web.client.RestTemplate;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * @author Caroline Jeandat {@literal <caroline.jeandat at rte-france.com>}
+ */
+@Service
+public class DirectoryService {
+    static final String DIRECTORY_API_VERSION = "v1";
+    private static final String DELIMITER = "/";
+
+    private final String baseUri;
+    private final RestTemplate restTemplate;
+
+    @Autowired
+       public DirectoryService(
+            @Value("${gridsuite.services.directory-server.base-uri:http://directory-server}") String baseUri,
+            RestTemplateBuilder restTemplateBuilder) {
+        this.baseUri = baseUri;
+        this.restTemplate = restTemplateBuilder.build();
+    }
+
+    public String getElementName(UUID elementUuid) {
+        Objects.requireNonNull(elementUuid);
+
+        URI path = UriComponentsBuilder
+                .fromPath(DELIMITER + DIRECTORY_API_VERSION + "/elements/{elementUuid}")
+                .buildAndExpand(elementUuid)
+                .toUri();
+
+        try {
+            ResponseEntity<Map<String, Object>> response =
+                    restTemplate.exchange(
+                            baseUri + path,
+                            HttpMethod.GET,
+                            null,
+                            new ParameterizedTypeReference<>() { }
+                    );
+
+            Map<String, Object> responseBody = response.getBody();
+            return responseBody != null ? (String) responseBody.get("elementName") : null;
+
+        } catch (HttpClientErrorException.NotFound e) {
+            return null;
+        }
+    }
+}

src/main/resources/application-local.yaml

@@ -18,3 +18,5 @@ gridsuite:
   services:
     filter-server:
       base-uri: http://localhost:5027
+    directory-server:
+      base-uri: http://localhost:5026