diff --git a/update_psa_helpers b/update_psa_helpers
index db4ab24..ff9479e 100755
--- a/update_psa_helpers
+++ b/update_psa_helpers
@@ -42,9 +42,9 @@ copy () {
         fi
         if grep -qE "^.*[.]conf\s*$" <<< ${f}; then
             local __f=${f#*etc/}
-            if ! cp "${customer_id_base_dir}/${f}" "/etc/${__f}"; then
+            if ! cp "${CUSTOMER_ID_BASE_DIR}/${f}" "/etc/${__f}"; then
                 log_error "$func:${LINENO}: cannot "\
-                    "cp ${customer_id_base_dir}/${f} /etc/${__f}"
+                    "cp ${CUSTOMER_ID_BASE_DIR}/${f} /etc/${__f}"
                 return 1
             fi
             log_info "$func:${LINENO}: copied $f to /etc/${__f}"
@@ -52,10 +52,10 @@ copy () {
             # TODO: die anderen system-verzeichnisse werden gebraucht
             local __f=${f#*opt/app/ATBAPP/}
             if [ "$__f" = "ATBQT.ini" ]; then
-                if ! cp "${customer_id_base_dir}/${f}" /opt/app/ATBAPP/${__f}
+                if ! cp "${CUSTOMER_ID_BASE_DIR}/${f}" /opt/app/ATBAPP/${__f}
                 then
                     log_error "$func:${LINENO}: cannot "\
-                      "cp ${customer_id_base_dir}/${f} /opt/app/ATBAPP/${__f}"
+                      "cp ${CUSTOMER_ID_BASE_DIR}/${f} /opt/app/ATBAPP/${__f}"
                     return 1
                 fi
             fi
@@ -107,35 +107,35 @@ check_md5_for_changed_conf_and_ini_files () {
             log_debug "$func:${LINENO} file=$file"
             if [[ "$file" =~ .*emp[.]conf.* ]]; then
                 js_key=".conf.szeged.zg[1].z[1].etc.psa_config.emp"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository="$(md5_of $emp_conf)"
             elif [[ "$file" =~ .*printer[.]conf.* ]]; then
                 js_key=".conf.szeged.zg[1].z[1].etc.psa_config.printer"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository="$(md5_of $printer_conf)"
             elif [[ "$file" =~ .*device[.]conf.* ]]; then
                 js_key=".conf.szeged.zg[1].z[1].etc.psa_config.device"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository="$(md5_of $device_conf)"
             elif [[ "$file" =~ .*ATBQT[.]ini.* ]]; then
                 js_key=".ini.szeged.zg[1].z[1].opt.app.ATBAPP.ATBQT"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository="$(md5_of $atbqt_ini)"
             elif [[ "$file" =~ .*sysconfig[.]ini.* ]]; then
                 js_key=".ini.szeged.zg[1].z[1].opt.app.sysconfig.sysconfig"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository=$(md5_of $sysconfig_sysconfig_ini)
             elif [[ "$file" =~ .*SystemControl[.]ini.* ]]; then
                 js_key=".ini.szeged.zg[1].z[1].opt.app.sysconfig.SystemControl"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository=$(md5_of $sysconfig_sysctrl_ini)
             elif [[ "$file" =~ .*ISMASMgr/ISMASMgr[.]ini.* ]]; then
                 js_key=".ini.szeged.zg[1].z[1].opt.app.ISMASMgr.ISMASMgr"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository=$(md5_of $ismasmgr_ismasmgr_ini)
             elif [[ "$file" =~ .*sysconfig/ISMASMgr[.]ini.* ]]; then
                 js_key=".ini.szeged.zg[1].z[1].opt.app.sysconfig.ISMASMgr"
-                md5sum_update_conf=$(cat $update_conf | jq -r $js_key)
+                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                 md5sum_repository=$(md5_of $sysconfig_ismasmgr_ini)
             else
                 continue
@@ -174,7 +174,7 @@ check_md5_for_opkg_packages () {
         fi
     done
 
-    local __update_conf="${customer_location_dir}/update.conf"
+    local __update_conf="${CUSTOMER_LOCATION_DIR}/update.conf"
     md5sum_repo=$(cat $__update_conf | jq -r .opkg.${package}.MD5Sum)
     if ! [ -z $md5sum_repo ]; then
         if [ "$md5sum_opkg_info" = "$md5sum_repo" ]; then
@@ -294,3 +294,13 @@ cleanup_previous_version() {
     local func="${FUNCNAME[0]}"
     return 0
 }
+
+check_for_apism () {
+    nc localhost 7778
+    if [ $? -eq 0 ]
+    then
+        return 0
+    fi
+    return 1
+}
+