Hi @ye.li,

I have found a method in the EMA C++ UnitTest application provided in the EMA C++ package to decode just encoded FieldList in EMA application using StaticDecoder class. Below is the sample code.

#include "Access/Impl/StaticDecoder.h" ...
FieldList fl;
fl.addReal(25, 80, OmmReal::ExponentPos1Enum);
fl.complete();

StaticDecoder::setData(&fl, &dictionary);
while (fl.forth()) 
{    
    const FieldEntry& fe = fl.getEntry();
    cout << "Name: " << fe.getName() << " Value: ";
    cout << fe.toString() << endl; 
}

The StaticDecoder::setData() requires RsslDataDictionary object which required dictionary data loaded from local dictionary files (RDMFIeldDictionary, enumtype.def) first.

RsslDataDictionary dictionary;
loadDictionaryFromFile(&dictionary);

loadDictionaryFromFile() code

bool loadDictionaryFromFile(RsslDataDictionary* pDictionary)
{
    RsslBool fieldDictionaryLoaded = RSSL_FALSE, enumTableLoaded = RSSL_FALSE;
    char errTxt[256];
    RsslBuffer errorText = { 255, (char*)errTxt };

    const char* fieldDictionaryFileName = "RDMFieldDictionary";
    const char* enumTableFileName = "enumtype.def";

    rsslClearDataDictionary(pDictionary);

    if (rsslLoadFieldDictionary(fieldDictionaryFileName, pDictionary, &errorText) < 0)
        cout << "\nUnable to load field dictionary.\n\tError Text: " << errorText.data << endl;
    else
        fieldDictionaryLoaded = RSSL_TRUE;

    if (rsslLoadEnumTypeDictionary(enumTableFileName, pDictionary, &errorText) < 0)
        cout << "\nUnable to load enum type dictionary.\n\tError Text: " << errorText.data << endl;
    else
        enumTableLoaded = RSSL_TRUE;

    if (fieldDictionaryLoaded && enumTableLoaded)
    {
        return true;
    }
    else
    {
        rsslDeleteDataDictionary(pDictionary);

        return false;
    }
}