Please change wsdl from
...
<xs:element minOccurs="0" name="STARTTIME" type="xs:string"/>
<xs:element minOccurs="0" name="ENDTIME" type="xs:string"/>
<xs:element minOccurs="1" name="FROM" type="xs:string"/>
...
to
...
<xs:element minOccurs="0" maxOccurs="unbounded" name="STARTTIME" type="xs:string"/>
<xs:element minOccurs="0" maxOccurs="unbounded" name="ENDTIME" type="xs:string"/>
<xs:element minOccurs="1" maxOccurs="unbounded" name="FROM" type="xs:string"/>
...
This change enables Taverna to sent lists of input to service calls