diff --git a/workflow/pl/rechnungseingang-pl-1.0.6.bpmn b/workflow/pl/rechnungseingang-pl-1.0.6.bpmn
index 52f6987..eb8140f 100644
--- a/workflow/pl/rechnungseingang-pl-1.0.6.bpmn
+++ b/workflow/pl/rechnungseingang-pl-1.0.6.bpmn
@@ -357,20 +357,19 @@ Bei Fragen wenden Sie sich bitte an info@imixs.com
         </imixs:item>
         <imixs:item name="txtbusinessrule" type="xs:string">
           <imixs:value><![CDATA[var result={};
- var refField="space.ref"; 
 result.isValid=true;
 result.errorMessage='';
 // SEPA ?
-if (workitem['payment.type'][0]!="direct_debit"  && workitem['payment.type'][0]!="no_sepa"  && workitem['payment.type'][0]!="credit" ) {
-   if ( workitem['cdtr.iban'][0]=='' || workitem['cdtr.bic'][0]==''   ) {
-     result.isValid=false;
-     result.errorMessage='Please enter a valid IBAN/BIC. ';
+if (workitem.getItemValueString('payment.type')!="direct_debit"  && workitem.getItemValueString('payment.type')!="no_sepa"  && workitem.getItemValueString('payment.type')!="credit" ) {
+  if (workitem.getItemValueString('cdtr.iban')=='' || workitem.getItemValueString('cdtr.bic')=='' ) {
+    result.isValid=false;
+    result.errorMessage='Please enter a valid IBAN/BIC. ';
   }
 }
- if (  ( workitem.get(refField) == null || '-'==workitem.get(refField)[0])   ) {
-     result.isValid=false;
-     result.errorMessage=result.errorMessage + 'Please choose a section.';
-  }]]></imixs:value>
+if ('-'==workitem.getItemValueString('space.ref')) {
+  result.isValid=false;
+  result.errorMessage=result.errorMessage + 'Please choose a section.';
+}]]></imixs:value>
         </imixs:item>
       </bpmn2:extensionElements>
       <bpmn2:documentation id="Documentation_105"><![CDATA[Invoice entered, forward to review]]></bpmn2:documentation>