Adding a substitution model is optional in the new DiscretizedSiteRat…

…eModel
beast-dev · Jul 17, 2023 · c422163 · c422163
1 parent e436a42
commit c422163
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/dr/evomodelxml/siteratemodel/GammaSiteRateModelParser.java b/src/dr/evomodelxml/siteratemodel/GammaSiteRateModelParser.java
@@ -129,9 +129,11 @@ public Object parseXMLObject(XMLObject xo) throws XMLParseException {
         GammaSiteRateDelegate delegate = new GammaSiteRateDelegate("GammaSiteRateDelegate", shapeParam, catCount, type, invarParam);
 
         DiscretizedSiteRateModel siteRateModel = new DiscretizedSiteRateModel(SiteModel.SITE_MODEL, muParam, muWeight, delegate);
-
-        siteRateModel.setSubstitutionModel(substitutionModel);
-        siteRateModel.addModel(substitutionModel);
+
+        if (substitutionModel != null) {
+            siteRateModel.setSubstitutionModel(substitutionModel);
+            siteRateModel.addModel(substitutionModel);
+        }
 
         return siteRateModel;
     }