Condition doesn't support the nested "if" element in Ant-contrib -

goal: if software version 1.1, run target runa, else runb. actually, there many targets needs run based on software version. below simpler extract of ant xml file.

<property name="version" value="" /> <target name="checksoftwareversion1.1">     <condition property="version1.1">         <if>             <endswith string="${version}" with="1.1" />             <then>                 <echo message="version ${version}" />             </then>         </if>     </condition> </target>  <target name="checksoftwareversion1.2">     <condition property="version1.2">         <if>             <endswith string="${version}" with="1.2" />             <then>                 <echo message="version ${version}" />             </then>         </if>     </condition> </target>  <target name="runa" if="version1.1"> </target> <target name="runb" if="version1.2"> </target> 

getting exception: condition doesn't support nested "if" element. clue on how solving or may better approach.. thanks