--- a/src/pyams_content/component/extfile/zmi/container.py	Wed Jun 13 08:55:06 2018 +0200
+++ b/src/pyams_content/component/extfile/zmi/container.py	Wed Jun 13 08:56:05 2018 +0200
@@ -16,7 +16,8 @@
 # import standard library
 
 # import interfaces
-from pyams_content.component.association.interfaces import IAssociationTarget, IAssociationContainer, IAssociationInfo
+from pyams_content.component.association.interfaces import IAssociationContainerTarget, IAssociationContainer, \
+    IAssociationInfo
 from pyams_content.component.extfile.interfaces import IExtFile, IExtImage
 from pyams_i18n.interfaces import II18n
 from pyams_skin.layer import IPyAMSLayer
@@ -37,7 +38,7 @@
 def get_files_list(request):
     """Get container files in JSON format for TinyMCE editor"""
     result = []
-    target = get_parent(request.context, IAssociationTarget)
+    target = get_parent(request.context, IAssociationContainerTarget)
     if target is not None:
         container = IAssociationContainer(target)
         result.extend([{'title': IAssociationInfo(item).user_title,
@@ -52,7 +53,7 @@
 def get_images_list(request):
     """Get container images in JSON format for TinyMCE editor"""
     result = []
-    target = get_parent(request.context, IAssociationTarget)
+    target = get_parent(request.context, IAssociationContainerTarget)
     if target is not None:
         container = IAssociationContainer(target)
         result.extend([{'title': IAssociationInfo(item).user_title,