diff --git a/views/afis/__init__.py b/views/afis/__init__.py
index ced7fbf8cafabd316b671b2a4b24f018a77f539d..423f0d99c272a1ca9a1e52eb5f430e3b563cb27d 100644
--- a/views/afis/__init__.py
+++ b/views/afis/__init__.py
@@ -248,16 +248,23 @@ def get_marks_list_for_target_folder( uuid, admin = True, mark_type = [ "mark_ta
         marks_list_tmp = config.db.query_fetchall( sql, ( uuid, ) )
         
         sql = "SELECT pc FROM cnm_folder WHERE uuid = %s"
-        pc = config.db.query_fetchone( sql, ( uuid, ) )[ "pc" ]
+        pc_success = False
+        try:
+            pc = config.db.query_fetchone( sql, ( uuid, ) )[ "pc" ]
+            pc_success = True
+        except:
+            current_app.logger.debug("ERROR: incidental marks folder not found")
         
-        for m in marks_list_tmp:
-            try:
-                for z in m[ "pfsp" ].split( "," ):
-                    if pc in pfsp2fpc[ z ]:
-                        marks_list.append( m )
-                        break
-            except:
-                continue
+        if(pc_success):
+
+            for m in marks_list_tmp:
+                try:
+                    for z in m[ "pfsp" ].split( "," ):
+                        if pc in pfsp2fpc[ z ]:
+                            marks_list.append( m )
+                            break
+                except:
+                    continue
                     
         return marks_list