diff --git a/sequencer.sh b/sequencer.sh
index 8e44dcc..7f7633a 100755
--- a/sequencer.sh
+++ b/sequencer.sh
@@ -2,12 +2,20 @@
 # shellcheck disable=SC2034 # variable not used
 # shellcheck disable=SC1090 # follow non constant source
 
+enableErrorCheck() {
+# Do not allow use of undefined vars. Use ${VAR:-} to use an undefined VAR
+  set -o nounset
+}
+disableErrorCheck() {
+# Do not allow use of undefined vars. Use ${VAR:-} to use an undefined VAR
+  set +o nounset
+}
+
 # Exit on error. Append "|| true" if you expect an error.
 set -o errexit
 # Exit on error inside any functions or subshells.
 set -o errtrace
-# Do not allow use of undefined vars. Use ${VAR:-} to use an undefined VAR
-set -o nounset
+enableErrorCheck
 # Catch the error in case mysqldump fails (but gzip succeeds) in `mysqldump |gzip`
 set -o pipefail
 # Turn on traces, useful while debugging but commented out by default