diff --git a/app/imports/parser/grammar.js b/app/imports/parser/grammar.js
index 064fc2f2..22d323c0 100644
--- a/app/imports/parser/grammar.js
+++ b/app/imports/parser/grammar.js
@@ -79,7 +79,7 @@ let ParserRules = [
     {"name": "exponentExpression", "symbols": ["unaryExpression"], "postprocess": id},
     {"name": "unaryExpression", "symbols": [(lexer.has("additiveOperator") ? {type: "additiveOperator"} : additiveOperator), "_", "unaryExpression"], "postprocess": d => node.unaryOperator.create({operator: d[0].value, right: d[2]})},
     {"name": "unaryExpression", "symbols": ["notExpression"], "postprocess": id},
-    {"name": "notExpression", "symbols": [(lexer.has("notOperator") ? {type: "notOperator"} : notOperator), "_", "notExpression"], "postprocess": d => node.notOperator.create({right: d[2]})},
+    {"name": "notExpression", "symbols": [(lexer.has("notOperator") ? {type: "notOperator"} : notOperator), "_", "notExpression"], "postprocess": d => node.not.create({right: d[2]})},
     {"name": "notExpression", "symbols": ["callExpression"], "postprocess": id},
     {"name": "callExpression", "symbols": ["name", "_", "arguments"], "postprocess": 
         d => node.call.create({functionName: d[0].name, args: d[2]})
diff --git a/app/imports/parser/grammar.ne b/app/imports/parser/grammar.ne
index 82681659..ddb0e884 100644
--- a/app/imports/parser/grammar.ne
+++ b/app/imports/parser/grammar.ne
@@ -109,7 +109,7 @@ unaryExpression ->
 | notExpression {% id %}
 
 notExpression ->
-  %notOperator _ notExpression {% d => node.notOperator.create({right: d[2]})%}
+  %notOperator _ notExpression {% d => node.not.create({right: d[2]})%}
 | callExpression {% id %}
 
 callExpression ->
diff --git a/app/imports/ui/creature/slots/SlotFillDialog.vue b/app/imports/ui/creature/slots/SlotFillDialog.vue
index c5c0180d..0b63870f 100644
--- a/app/imports/ui/creature/slots/SlotFillDialog.vue
+++ b/app/imports/ui/creature/slots/SlotFillDialog.vue
@@ -377,6 +377,7 @@ export default {
               disabledNodeCount += 1;
             }
           } catch (e){
+            console.warn(e);
             let error = prettifyParseError(e);
             node._disabledBySlotFillerCondition = true;
             node._conditionError = error;