Harman Air SDK release 33.1.1.300 mxml compile error

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Question :

We are trying to migrate our legacy application Flex/AIR application, but we receive a strange error even just by compiling a simple Hello 

World application:

X1.mxml:

<?xml version="1.0" encoding="utf-8"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"

               xmlns:s="library://ns.adobe.com/flex/spark"

               xmlns:mx="library://ns.adobe.com/flex/mx" width="640" height="480">

    <s:layout>

        <s:BasicLayout />

    </s:layout>

    <s:Label text="Hello World!" horizontalCenter="0" verticalCenter="0" />

</s:Application>

This is the error:

./mxmlc X1.mxml

Loading configuration: /Users/g.zanella/Downloads/AIRSDK_MacOS (1)/frameworks/flex-config.xml

Error: /Users/g.zanella/Downloads/AIRSDK_MacOS (1)/bin/X1.mxml is of an unsupported type: mxml

with the legacy Apache Flex compiler all works fine:

/Applications/Adobe Flash Builder 4.6/sdks/4.16.0 AIR 31/bin/mxmlc X1.mxml

Create X1.swf

/Users/g.zanella/Downloads/AIRSDK_MacOS (1)/bin/mxmlc X1.mxml

Generates the above error

Thanks in advance for the reply