Fix missing error message for invalid step doing a selection of steps

sequencer/sequencer.sh

@@ -485,7 +485,7 @@ execute() {
   fi
 
   # don't execute step functions which are not available
-  if [ $NOTFOUND -eq 1 ] ; then
+  if [ $NOTFOUND -ne 0 ] ; then
     return $NOTFOUND
   fi 
 
@@ -540,7 +540,6 @@ checkStep() {
     eval 'ref=$alias_'"$1"
     # Catch special character after eval
     if ! [[ "$ref" =~ $rex ]] ; then
-      echoerr " [E] Invalid step: $1"
       ref=0
     fi
   else
@@ -548,6 +547,7 @@ checkStep() {
   fi
 
   if (( $ref < 1 ||  $ref > $MAX_STEP )) ; then
+    echoerr " [E] Invalid step: $ref"
     return 0 
   else
     existsFunction step_$ref
@@ -555,6 +555,7 @@ checkStep() {
       return $ref
     else
       # step doesn't exist
+      echoerr " [E] Invalid step: $ref"
       return 0
     fi
   fi
@@ -593,7 +594,7 @@ continous() {
     execute -q $i
     local res=$?
     if [ $res -ne 0 ] ; then
-      break;
+      break 
     fi
   done
 }
@@ -616,7 +617,7 @@ selection() {
     step=$?
     # stop on step 0 
     if [ $step -eq 0 ] ; then
-      break
+      return 1
     else 
       execute $step
     fi