diff --git a/ex/CMD b/ex/CMD
index 5e71810f49ce3a6f7e2b00574105a82e458c69bd..91ffe020358c85661b8d2e41220ba7cd298643ab 100644
--- a/ex/CMD
+++ b/ex/CMD
@@ -1,4 +1,10 @@
 python buckle.py -Q --mode simulate
 python buckle.py -Q --mode search
+python simulate_FOLD.py -Q --mode simulate --base_filename tent --facet_model N4B5
+# simulates 4-node, 5-bar model for tent file
+# outputs 'error: Non pos-def mass matrix' for 3 entries of matrix
+python simulate_FOLD.py -Q --mode simulate --base_filename tent --facet_model N4B6
+# simulates 4-node, 6-bar model for tent file
+# outputs 'error: Non pos-def mass matrix' for 3 entries of matrix
 gnuplot
 load buckle_frame3dd.csv.plt