diff --git a/read_config b/read_config
index b0f63d2..ab8198f 100755
--- a/read_config
+++ b/read_config
@@ -126,15 +126,15 @@ if [ ${read_config_sourced:-1} = "1" ]; then    # include only once
         # TODO: falls mehrere gruppen/zonen auftauchen hier anpassen        
         readonly zgroup=1
         readonly zone=1
-        readonly customer_base_dir="${__customer_base_dir}/${zgroup}/${zone}"
-        if [ -d "$customer_base_dir" ]; then
+        readonly CUSTOMER_BASE_DIR="${__customer_base_dir}/${zgroup}/${zone}"
+        if [ -d "$CUSTOMER_BASE_DIR" ]; then
             log_debug "$func:${LINENO}: customer-base-dir="
-            log_debug "$func:${LINENO}:      $customer_base_dir"
+            log_debug "$func:${LINENO}:      $CUSTOMER_BASE_DIR"
         else
-            log_fatal "$func:${LINENO}: $customer_base_dir does not exist"
+            log_fatal "$func:${LINENO}: $CUSTOMER_BASE_DIR does not exist"
         fi
 
-        readonly psa_config_dir="${customer_base_dir}/etc/psa_config"
+        readonly psa_config_dir="${CUSTOMER_BASE_DIR}/etc/psa_config"
         if [ -d "$psa_config_dir" ]; then
             log_debug "$func:${LINENO}: psa_config_dir="
             log_debug "$func:${LINENO}:      $psa_config_dir"
@@ -142,7 +142,7 @@ if [ ${read_config_sourced:-1} = "1" ]; then    # include only once
             log_fatal "$func:${LINENO}:  $psa_config_dir does not exist"
         fi
 
-        readonly psa_update_dir="${customer_base_dir}/etc/psa_update"
+        readonly psa_update_dir="${CUSTOMER_BASE_DIR}/etc/psa_update"
         if [ -d "$psa_update_dir" ]; then
             log_debug "$func:${LINENO}: psa_update_dir="
             log_debug "$func:${LINENO}:      $psa_update_dir"
@@ -150,7 +150,7 @@ if [ ${read_config_sourced:-1} = "1" ]; then    # include only once
             log_fatal "$func:${LINENO}:  $psa_update_dir does not exist"
         fi
 
-        readonly psa_base_ini_dir="${customer_base_dir}/opt/app"
+        readonly psa_base_ini_dir="${CUSTOMER_BASE_DIR}/opt/app"
         if [ -d "$psa_base_ini_dir" ]; then
             log_debug "$func:${LINENO}: psa_base_ini_dir="
             log_debug "$func:${LINENO}:      $psa_base_ini_dir"
@@ -158,13 +158,14 @@ if [ ${read_config_sourced:-1} = "1" ]; then    # include only once
             log_fatal "$func:${LINENO}: $psa_base_ini_dir does not exist"
         fi
         
-        readonly psa_sysconfig_dir="${psa_base_ini_dir}/sysconfig"
+        readonly SYSCONFIG_SYS_DIR="/opt/app/sysconfig"
+        readonly PSA_SYSCONFIG_DIR="$CUSTOMER_BASE_DIR$SYSCONFIG_SYS_DIR"
         # if [ -d "$psa_syconfig_dir" ]; DOES NOT WORK !!!
-        if ls -al $psa_sysconfig_dir > /dev/null; then
-            log_debug "$func:${LINENO}: psa_sysconfig_dir="
-            log_debug "$func:${LINENO}:      $psa_sysconfig_dir"
+        if ls -al $PSA_SYSCONFIG_DIR > /dev/null; then
+            log_debug "$func:${LINENO}: PSA_SYSCONFIG_DIR="
+            log_debug "$func:${LINENO}:      $PSA_SYSCONFIG_DIR"
         else
-            log_error "$func:${LINENO}: $psa_sysconfig_dir does not exist"
+            log_error "$func:${LINENO}: $PSA_SYSCONFIG_DIR does not exist"
         fi
 
         readonly psa_ismasmgr_dir="${psa_base_ini_dir}/ISMASMgr"
@@ -174,8 +175,12 @@ if [ ${read_config_sourced:-1} = "1" ]; then    # include only once
         else
             log_fatal "$func:${LINENO}: $psa_ismasmgr_dir does not exist"
         fi
+
+        readonly CONF_SYS_DIR="/etc/psa_config"
+        readonly OPKG_SYS_DIR="/etc/psa_update"
+        readonly ATBAPP_SYS_DIR="/opt/app/ATBAPP"
         
-        readonly psa_atbqt_dir="${psa_base_ini_dir}/ATBAPP"
+        readonly psa_atbqt_dir="$CUSTOMER_BASE_DIR$ATBAPP_SYS_DIR"
         if [ -d "$psa_atbqt_dir" ]; then
             log_debug "$func:${LINENO}: psa_atbqt_dir="
             log_debug "$func:${LINENO}:      $psa_atbqt_dir"
@@ -183,44 +188,55 @@ if [ ${read_config_sourced:-1} = "1" ]; then    # include only once
             log_fatal "$func:${LINENO}: $psa_atbqt_dir does not exist"
         fi
 
-        readonly atbqt_ini="${psa_atbqt_dir}/ATBQT.ini"
-        if [ -f "$atbqt_ini" ]; then
+        readonly ATBQT_INI="ATBQT.ini"
+        readonly ATBQT_INI_FULL="${psa_atbqt_dir}/$ATBQT_INI"
+        if [ -f "$ATBQT_INI_FULL" ]; then
             log_debug "$func:${LINENO}: ATBTQT.ini="
-            log_debug "$func:${LINENO}:      $atbqt_ini"
+            log_debug "$func:${LINENO}:      $ATBQT_INI_FULL"
         else
-            log_fatal "$func:${LINENO}: $atbqt_ini does not exist"
+            log_fatal "$func:${LINENO}: $ATBQT_INI_FULL does not exist"
         fi
+       
+        readonly ISMASMGR_INI="ISMASMgr.ini"
+        readonly ISMASMGR_SYS_DIR="/opt/app/ISMASMgr"
 
-        readonly ismasmgr_ismasmgr_ini="${psa_ismasmgr_dir}/ISMASMgr.ini"
-        if [ -f "$ismasmgr_ismasmgr_ini" ]; then
+        readonly ISMASMGR_ISMASMGR_INI_FULL="${psa_ismasmgr_dir}/$ISMASMGR_INI"
+        if [ -f "$ISMASMGR_ISMASMGR_INI_FULL" ]; then
             log_debug "$func:${LINENO}: ismasmgr_ismasmgr.ini="
-            log_debug "$func:${LINENO}:      $ismasmgr_ismasmgr_ini"
+            log_debug "$func:${LINENO}:      $ISMASMGR_ISMASMGR_INI_FULL"
         else
-            log_fatal "$func:${LINENO}: $ismasmgr_ismasmgr_ini does not exist"
+            log_fatal "$func:${LINENO}: $ISMASMGR_ISMASMGR_INI_FULL "\
+                "does not exist"
         fi
 
-        readonly sysconfig_ismasmgr_ini="${psa_sysconfig_dir}/ISMASMgr.ini"
-        if [ -f "$sysconfig_ismasmgr_ini" ]; then
+        readonly SYSCONFIG_ISMASMGR_INI_FULL="${PSA_SYSCONFIG_DIR}/ISMASMgr.ini"
+        if [ -f "$SYSCONFIG_ISMASMGR_INI_FULL" ]; then
             log_debug "$func:${LINENO}: sysconfig_ismasmgr.ini="
-            log_debug "$func:${LINENO}:      $sysconfig_ismasmgr_ini"
+            log_debug "$func:${LINENO}:      $SYSCONFIG_ISMASMGR_INI_FULL"
         else
-            log_fatal "$func:${LINENO}: $sysconfig_ismasmgr_ini does not exist"
+            log_fatal "$func:${LINENO}: $SYSCONFIG_ISMASMGR_INI_FULL "\
+                    "does not exist"
         fi
 
-        readonly sysconfig_sysconfig_ini="${psa_sysconfig_dir}/sysconfig.ini"
-        if [ -f "$sysconfig_sysconfig_ini" ]; then
+        readonly SYS_CONFIG_INI="sysconfig.ini"
+        readonly __sysc_sysc_full="${PSA_SYSCONFIG_DIR}/$SYS_CONFIG_INI"
+        readonly SYSCONFIG_SYSCONFIG_INI_FULL="$__sysc_sysc_full"
+        if [ -f "$SYSCONFIG_SYSCONFIG_INI_FULL" ]; then
             log_debug "$func:${LINENO}: sysconfig_sysconfig.ini="
-            log_debug "$func:${LINENO}:      $sysconfig_sysconfig_ini"
+            log_debug "$func:${LINENO}:      $SYSCONFIG_SYSCONFIG_INI_FULL"
         else
-            log_fatal "$func:${LINENO}: $sysconfig_sysconfig_ini does not exist"
+            log_fatal "$func:${LINENO}: "\
+                "$SYSCONFIG_SYSCONFIG_INI_FULL does not exist"
         fi
 
-        readonly sysconfig_sysctrl_ini="${psa_sysconfig_dir}/SystemControl.ini"
-        if [ -f "$sysconfig_sysctrl_ini" ]; then
+        readonly "SYSTEM_CONTROL_INI"="SystemControl.ini"
+        local __sysctrl_ini_full="${PSA_SYSCONFIG_DIR}/$SYSTEM_CONTROL_INI"
+        readonly SYSCONFIG_SYSCTRL_INI_FULL="$__sysctrl_ini_full"
+        if [ -f "$SYSCONFIG_SYSCTRL_INI_FULL" ]; then
             log_debug "$func:${LINENO}: sysconfig_systemcontrol.ini="
-            log_debug "$func:${LINENO}:      $sysconfig_sysctrl_ini"
+            log_debug "$func:${LINENO}:      $SYSCONFIG_SYSCTRL_INI_FULL"
         else
-            log_fatal "$func:${LINENO}: $sysconfig_sysctrl_ini does not exist"
+            log_fatal "$func:${LINENO}: $SYSCONFIG_SYSCTRL_INI_FULL does not exist"
         fi
 
         readonly emp_conf="${psa_config_dir}/emp.conf"
@@ -255,17 +271,17 @@ if [ ${read_config_sourced:-1} = "1" ]; then    # include only once
             log_fatal "$func:${LINENO}: $opkg_cmds_file does not exist"
         fi
 
-        readonly KNOWN_CONF_FILES=(${CUSTOMER_LOCATION}/update.conf  \
-                                   ${CUSTOMER_LOCATION}/current.conf \
-                                   ${device_conf##*${CUSTOMER_ID}/}  \
-                                   ${emp_conf##*${CUSTOMER_ID}/}     \
+        readonly KNOWN_CONF_FILES=(${CUSTOMER_LOCATION}/update.conf     \
+                                   ${CUSTOMER_LOCATION}/current.conf    \
+                                   ${device_conf##*${CUSTOMER_ID}/}     \
+                                   ${emp_conf##*${CUSTOMER_ID}/}        \
                                    ${printer_conf##*${CUSTOMER_ID}/})
 
-        readonly KNOWN_INI_FILES=(${atbqt_ini##*${CUSTOMER_ID}/}              \
-                                  ${ismasmgr_ismasmgr_ini##*${CUSTOMER_ID}/}  \
-                                  ${sysconfig_ismasmgr_ini##*${CUSTOMER_ID}/} \
-                                  ${sysconfig_sysconfig_ini##*${CUSTOMER_ID}/}\
-                                  ${sysconfig_sysctrl_ini##*${CUSTOMER_ID}/})
+        readonly KNOWN_INI_FILES=(${ATBQT_INI_FULL##*${CUSTOMER_ID}/}   \
+                      ${ISMASMGR_ISMASMGR_INI_FULL##*${CUSTOMER_ID}/}   \
+                      ${SYSCONFIG_ISMASMGR_INI_FULL##*${CUSTOMER_ID}/}  \
+                      ${SYSCONFIG_SYSCONFIG_INI_FULL##*${CUSTOMER_ID}/} \
+                      ${SYSCONFIG_SYSCTRL_INI_FULL##*${CUSTOMER_ID}/})
         
         readonly KNOWN_FILES=(${KNOWN_CONF_FILES[@]} \
                               ${KNOWN_INI_FILES[@]}  \