diff --git a/sequencer.sh b/sequencer.sh
index 4b7ad28..5c4d1be 100755
--- a/sequencer.sh
+++ b/sequencer.sh
@@ -68,7 +68,7 @@ set -o pipefail
   _sqr_debug=0
   _sqr_dry=0
   _sqr_editor=
-  _sqr_errno=0
+  _sqr_errno=
   _sqr_interactive=1
   _sqr_single=0
   readonly _sqr_stepMax=512
@@ -246,15 +246,7 @@ USAGE_API
   echo -e "$(col green) echoinfo [...]$(col off)"
   cat <<USAGE_API
     echo additional correctly indented line to step info
-      [...] : all parameter are forwared to echo
-
-USAGE_API
-  echo -e "$(col green) echoinfoArgs [...]$(col off)"
-  cat <<USAGE_API
-    echo argument description after step number or alias.
-    This must be called first in the step info function.
-    Does not add a newline at the end.
-      [...] : no parameter are forwared to echo
+      [...] : all parameter are passed to echo
 
 USAGE_API
   echo -e "$(col green) endIfEmpty <VARIABLENAME> [DESCRIPTION]$(col off)"
@@ -266,12 +258,15 @@ USAGE_API
 USAGE_API
   echo -e "$(col green) endReturn [OPTIONS] [MESSAGE]$(col off)"
   cat <<USAGE_API
-    Notifys user that there was an error (previously saved by saveReturn,
-    or -o [ERRORCODE]) and asks to continue or end the sequence.
+    Notifys user that there was an error determined in the following order:
+      1) -o <ERRORCODE>
+      2) previously saved by saveReturn
+      3) \$? not 0
+    and asks to continue if run interactively or ends the sequence.
     Always exits with evaluated error code.
       [OPTIONS]
-        -f           : force exit without user input, if error code is not 0
-        -o ERRORCODE : override stored error code and check ERRORCODE
+        -f             : force exit without user input, if error code is not 0
+        -o <ERRORCODE> : override stored error code and check ERRORCODE
       [MESSAGE]
         String which is displayed in the error output
 
@@ -371,7 +366,7 @@ USAGE_API
 USAGE_API
   echo -e "$(col green) silent$(col off)"
   cat <<USAGE_API
-    Returns true if seq runs interactive.
+    Returns true if seq runs with lowest log level (-qq).
 
 USAGE_API
   echo -e "$(col green) step <STEP NUMBER OR ALIAS>$(col off)"
@@ -740,16 +735,17 @@ rmold() {
   done < <(ls ${hideOpt} -rt1 "${target}" | head -$((total - retain)))
 }
 
-# saveReturn <ERRNO>
-# Function returns with <ERRNO> in case step wants additional evaluation
+# saveReturn [ERRNO]
+# Function returns with detected return value in case step wants additional evaluation
 saveReturn() {
-  (( ${1:-"0"} )) && _sqr_errno=${1}
-  return "${_sqr_errno}"
+  local lerrno=${1:-$?}
+  (( lerrno )) && _sqr_errno=${lerrno}
+  return "${_sqr_errno:=${lerrno}}"
 }
 
 # getReturn
 # Returns latest saved $_sqr_errno
-getReturn() { return "${_sqr_errno}"; }
+getReturn() { return "${_sqr_errno:-0}"; }
 
 # endReturn [-f] [-o ERRORCODE] [MESSAGE]
 #         -f : force exit with $_sqr_errno without user input
@@ -757,8 +753,9 @@ getReturn() { return "${_sqr_errno}"; }
 #  [MESSAGE] : Custom error message
 #
 endReturn() {
+  # Use last return code if nothing was saved before
+  local errorCode=${_sqr_errno:-$?}
   local forceExit=0
-  local errorCode=${_sqr_errno}
   local endMessage=""
 
   for _ in "$@" ; do
@@ -766,12 +763,11 @@ endReturn() {
       -f) forceExit=1 && shift ;;
       -o)
         shift
-        local rex='^[-]*[0-9]+$'
         # Check if string is a number or alias
-        if [[ "${1:?}" =~ ${rex} ]] ; then
-          errorCode="${1:?}"
+        if [[ "${1:?}" =~ ^[0-9]+$ ]] ; then
+          errorCode="${1}"
         else
-          warning "Ignoring invalid error code: $1"
+          warning "Ignoring invalid error code: ${1}"
         fi
         shift ;;
       "") break ;;
@@ -803,7 +799,7 @@ endReturn() {
       exit "${errorCode}"
     else
       # reset saved error code if user chooses to continue
-      _sqr_errno=0
+      _sqr_errno=
       sqr::echo
       warning "Continuing sequence..."
     fi
@@ -1395,7 +1391,8 @@ execute() {
         exit 1 ;;
     esac
   else
-    "step_$1" "$1" "${seq_args[@]}"
+    true # reset return value from "if interactive ; then"
+    "step_${1}" "${1}" "${seq_args[@]}"
     _seq_stepReturn="$?"
   fi
   color none