diff --git a/ebos/eclbasegridmanager.hh b/ebos/eclbasegridmanager.hh
index b9506fd72..8e9e5ddea 100644
--- a/ebos/eclbasegridmanager.hh
+++ b/ebos/eclbasegridmanager.hh
@@ -140,6 +140,8 @@ public:
         ParseModePairs tmp;
         tmp.push_back(ParseModePair(Opm::ParseContext::PARSE_RANDOM_SLASH, Opm::InputError::IGNORE));
         tmp.push_back(ParseModePair(Opm::ParseContext::PARSE_MISSING_DIMS_KEYWORD, Opm::InputError::WARN));
+        tmp.push_back(ParseModePair(Opm::ParseContext::SUMMARY_UNKNOWN_WELL, Opm::InputError::WARN));
+        tmp.push_back(ParseModePair(Opm::ParseContext::SUMMARY_UNKNOWN_GROUP, Opm::InputError::WARN));
         Opm::ParseContext parseContext(tmp);
 
         deck_ = parser.parseFile(fileName , parseContext);