Hi, if i make a check on a variable, then it doen't work, ${destination} will shown as empty: -> <regex field="${destination}" expression="^(.+)$"/> but if i make a subcheck in this line, then it works korrektly: -> <regex field="${regex(${destination}|^(.*)$)}" expression="^(.+)$"/> Why? I understand something wrong? On the Wiki -> Dialplan_XML -> Conditions -> Nested Condition Caveats and Notes. Here is a example with conditions with variables. see my complete extension tag. <extension name="my_extension"> <condition field="destination_number" expression="^001234(.+)$" break="on-false"> <action application="set" data="destination=${global_getvar(C4B_OneNumber_$1)}"/> <action application="log" data="DEBUG ${destination}"/> <!-- here i can see, destination is set correctly --> </condition> <condition regex="all"> <regex field="${regex(${destination}|^(.*)$)}" expression="^(.+)$"/> <!-- this works fine --> <!--<regex field="${destination}" expression="^(.+)$"/>--> <!-- this does't work! --> <anti-action application="log" data="INFO [$1]"/> <!-- in the wrong example i can see $1 is empty and on the log output in the CLI, the destination will shown as empty too. --> <action application="bridge" data="sofia/internal/123${destination}@$${c4b_gateway01}"/> <anti-action application="log" data="ERR is empty? [${destination}]"/> <!-- in the wrong example i can here see again, der destination is set correctly --> </condition> </extension> Thanks for your Help Alex