diff --git a/icetime/icetime.cc b/icetime/icetime.cc
index 2ba3158..b95c2fe 100644
--- a/icetime/icetime.cc
+++ b/icetime/icetime.cc
@@ -779,6 +779,10 @@ struct TimingAnalysis
 
 		if (n.empty()) {
 			n = global_max_path_net;
+			if (n.empty()) {
+				fprintf(stderr, "No path found!\n");
+				exit(1);
+			}
 			if (frpt) {
 				int i = fprintf(frpt, "Report for critical path:\n");
 				while (--i) fputc('-', frpt);