asn1c: J2735 (2016 version) MessageFrame cannot be decoded?

Hi, I’m current facing this issue: MessageFrame cannot be decoded after encoded.

A BSM is generated with some customized fields. When testing to encode and decode BSM without encapsulating in MessageFrame, both der_encode_to_buffer() and ber_decode() functions work well.

But after encapsulating BSM in MessageFrame, encoding function seems to work (I’m not sure if it is working correctly), decoding function does not work. It gives the result code: 2, which is failure.

All messages are properly written, since I can verify them by decode the byte sequence into xml format for verification.

The message below is xml format:

<MessageFrame>
    <messageId>20</messageId>
    <value>
        <BasicSafetyMessage>
            <coreData>
                <msgCnt>0</msgCnt>
                <id></id>
                <secMark>0</secMark>
                <lat>0</lat>
                <long>0</long>
                <elev>0</elev>
                <accuracy>
                    <semiMajor>0</semiMajor>
                    <semiMinor>0</semiMinor>
                    <orientation>0</orientation>
                </accuracy>
                <transmission><neutral/></transmission>
                <speed>0</speed>
                <heading>470220800</heading>
                <angle>847118336</angle>
                <accelSet>
                    <long>2140209152</long>
                    <lat>2139422720</lat>
                    <vert>0</vert>
                    <yaw>1908211712</yaw>
                </accelSet>
                <brakes>
                    <wheelBrakes>
                        0000000000000000000000000000000000000
                    </wheelBrakes>
                    <traction><unavailable/></traction>
                    <abs><unavailable/></abs>
                    <scs><unavailable/></scs>
                    <brakeBoost><unavailable/></brakeBoost>
                    <auxBrakes><unavailable/></auxBrakes>
                </brakes>
                <size>
                    <width>0</width>
                    <length>0</length>
                </size>
            </coreData>
            <platoon>
                <status>00</status>
                <position>00</position>
                <ecef>
                    <ecefX>D6 9A 07 91</ecefX>
                    <ecefY>D6 9A 07 91</ecefY>
                    <ecefZ>D6 9A 07 91</ecefZ>
                </ecef>
                <brakePercentage><minPressure/></brakePercentage>
                <platoonPos>
                    <headway>-2012020736</headway>
                    <range>604307456</range>
                    <rangeRate>2138636288</rangeRate>
                </platoonPos>
                <goal>
                    <desiredAcc>2138374144</desiredAcc>
                    <goalHeadway>1614479360</goalHeadway>
                    <goalSpeed>1476395008</goalSpeed>
                </goal>
            </platoon>
        </BasicSafetyMessage>
    </value>
</MessageFrame>

What could be wrong?