diff --git a/examples/colloid/in.colloid b/examples/colloid/in.colloid
index 589b4478e31ebc0d5e7f3f3b0833c0508aff857a..27e6e32f4e348363e5cd5b1cbaf03fd9be178d26 100644
--- a/examples/colloid/in.colloid
+++ b/examples/colloid/in.colloid
@@ -29,7 +29,8 @@ pair_coeff 1 1 1.0 1.0 5.0 5.0 12.5
pair_coeff 1 2 5.0 1.0 5.0 0.0 7.0
pair_coeff 2 2 10.0 1.0 0.0 0.0 2.5
-fix 1 all npt temp 2.0 2.0 1.0 iso 0.0 1.0 10.0 drag 1.0
+fix 1 all npt temp 2.0 2.0 1.0 iso 0.0 1.0 10.0 drag 1.0 &
+ mtk no pchain 0 tchain 1
fix 2 all enforce2d
dump 1 all atom 200 dump.colloid
diff --git a/examples/ellipse/in.ellipse.gayberne b/examples/ellipse/in.ellipse.gayberne
index 870c7bfe2bab02a10858d9b547fd7db88c775276..b739082994095a0889ec4f9e25edbab6db6c423a 100644
--- a/examples/ellipse/in.ellipse.gayberne
+++ b/examples/ellipse/in.ellipse.gayberne
@@ -47,7 +47,8 @@ dump 1 all custom 100 dump.ellipse.gayberne &
#dump 1 all custom 100 dump.ellipse.resquared &
# id type x y z quatw quati quatj quatk
-fix 1 all npt/asphere temp 2.0 2.0 0.1 iso 0.0 1.0 1.0
+fix 1 all npt/asphere temp 2.0 2.0 0.1 iso 0.0 1.0 1.0 &
+ mtk no pchain 0 tchain 1
fix 2 all enforce2d
compute_modify 1_temp extra ${dof}
diff --git a/examples/ellipse/in.ellipse.resquared b/examples/ellipse/in.ellipse.resquared
index 2843dfd701351426ba2d0bd51782edd29034ad1d..c7a2030f9ee41ae1890d72b1eb7a9c20d64af993 100644
--- a/examples/ellipse/in.ellipse.resquared
+++ b/examples/ellipse/in.ellipse.resquared
@@ -47,7 +47,8 @@ timestep 0.002
dump 1 all custom 100 dump.ellipse.resquared &
id type x y z quatw quati quatj quatk
-fix 1 all npt/asphere temp 2.0 2.0 0.1 iso 0.0 1.0 1.0
+fix 1 all npt/asphere temp 2.0 2.0 0.1 iso 0.0 1.0 1.0 &
+ mtk no pchain 0 tchain 1
fix 2 all enforce2d
compute_modify 1_temp extra ${dof}
diff --git a/examples/min/in.min.box b/examples/min/in.min.box
index 9850309034917d8212e4e7e07a6f4e2e4f4927af..509d78d12e7b8498f4b7fd6e10a2eaef5bb4d3ab 100644
--- a/examples/min/in.min.box
+++ b/examples/min/in.min.box
@@ -36,9 +36,9 @@ dump_modify 1 every 25
thermo 50
minimize 1.0e-6 0.001 1000 10000
-fix 3 all box/relax x 1.0 y 2.0 vmax 1.0e-4 nreset 1000
+fix 3 all box/relax x 1.0 y 2.0 vmax 1.0e-4 nreset 100
thermo_style custom step temp pe pxx pyy pxy
min_modify line quadratic
-minimize 0.0 1.0e-3 10000 100000
+minimize 0.0 1.0e-6 10000 100000