diff --git a/EXAMPLES/MATRIX_MARKET/arpackmm.sh b/EXAMPLES/MATRIX_MARKET/arpackmm.sh
index 33b2a867..cb7bebe2 100755
--- a/EXAMPLES/MATRIX_MARKET/arpackmm.sh
+++ b/EXAMPLES/MATRIX_MARKET/arpackmm.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -eu
 
 for eigPb in "--A As.mtx" "--nonSymPb --A An.mtx" "--nonSymPb --cpxPb --A Az.mtx"
 do
diff --git a/EXAMPLES/MATRIX_MARKET/issue215.sh b/EXAMPLES/MATRIX_MARKET/issue215.sh
index 8cae6263..4b9bf600 100755
--- a/EXAMPLES/MATRIX_MARKET/issue215.sh
+++ b/EXAMPLES/MATRIX_MARKET/issue215.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -eu
 
 # Note: need to shift slightly as eigen value is zero.
 ./arpackmm --A issue215.mtx --mag LM --nbEV 1 --nbCV 4 --shiftReal 0.1
diff --git a/EXAMPLES/MATRIX_MARKET/issue401.sh b/EXAMPLES/MATRIX_MARKET/issue401.sh
index 241c24ad..dab4b0ee 100755
--- a/EXAMPLES/MATRIX_MARKET/issue401.sh
+++ b/EXAMPLES/MATRIX_MARKET/issue401.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -eu
 
 ./arpackmm --A issue401.mtx --mag LA --nbEV 1 --nbCV 5
 if [ "$?" -ne "0" ]; then exit 1; fi