X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.debug.ui%2Fsrc%2Forg%2Fsimantics%2Fdebug%2Fui%2FGraphDebugger.java;h=c3b3ab8b94792ea4dc12942eae7455ed26568d91;hp=b51ed4d000ca0b2b8aa6a889546a0fa93950c93d;hb=34d0a75321b7f7d139fe101ccae5d0538b04408e;hpb=5344fb90be3f898b4455acc96870fabdd6326f3f

diff --git a/bundles/org.simantics.debug.ui/src/org/simantics/debug/ui/GraphDebugger.java b/bundles/org.simantics.debug.ui/src/org/simantics/debug/ui/GraphDebugger.java
index b51ed4d00..c3b3ab8b9 100644
--- a/bundles/org.simantics.debug.ui/src/org/simantics/debug/ui/GraphDebugger.java
+++ b/bundles/org.simantics.debug.ui/src/org/simantics/debug/ui/GraphDebugger.java
@@ -952,11 +952,11 @@ public class GraphDebugger extends Composite {
         try {
             Layer0 L0 = Layer0.getInstance(graph);
             if (graph.isInstanceOf(r, L0.Assertion)) {
-                Resource pred = graph.getSingleObject(r, L0.HasPredicate);
+                Resource pred = graph.getPossibleObject(r, L0.HasPredicate);
                 // Don't know how I encountered this but it seems to be possible in some cases..
                 // Resource obj = graph.getSingleObject(r, L0.HasObject);
                 Resource obj = graph.getPossibleObject(r, L0.HasObject);
-                String tmp = htmlEscape( getResourceName(graph, pred) + " -> " + (obj == null ? "No object ?" : getResourceName(graph, obj)) + " (Assertion)" );
+                String tmp = htmlEscape( (pred == null ? "No predicate ?" : getResourceName(graph, pred)) + " -> " + (obj == null ? "No object ?" : getResourceName(graph, obj)) + " (Assertion)" );
                 name = tmp.substring(0, Math.min(80, tmp.length()));
             } else {
                 String resourceName = getResourceName(graph, r);