Hi all,
I am using the Eikon API for Python with the fields shown below.
    fields_pricingdata_eq = ['TR.RICCode',
                            'TR.InstrumentDescription',
                            'TR.WertCode',
                            'TR.CUSIPExtended',
                            'TR.SEDOLCode',
                            'TR.AssetCategory',
                            'Avail(TR.CompanyMarketCap.currency, TR.FundCurrency)',
                            'TR.GICSSector',
                            'TR.GICSIndustry',
                            'TR.GICSIndustryGroup',
                            'TR.GICSSubIndustry',
                            'Avail(TR.ExchangeCountry,TR.FundRegisteredCountry)',
                            'TR.HeadquartersCountry',
                            'TR.HQCountryCode',
                            'Avail(TR.PriceClose(Curn=EUR), TR.FundNav(Curn=EUR))',
                            'TR.BIDPRICE(Curn=EUR)',
                            'TR.ASKPRICE(Curn=EUR)',
                            'TR.CompanySharesOutstanding',
                            'TR.CompanyMarketCap',
                            'TR.DPSActValue(Curn=EUR)',
                            'TR.BasicNormalizedEps(Curn=EUR)',
                            'TR.IssuerRating(IssuerRatingSrc=MIS; RatingScope=DMS)',
                            'TR.IssuerRating(IssuerRatingSrc=MIS; RatingScope=FRN)',
                            'TR.IssuerRating(IssuerRatingSrc=SPI; RatingScope=DMS)',
                            'TR.IssuerRating(IssuerRatingSrc=SPI; RatingScope=FRN)',
                            'TR.IssuerRating(IssuerRatingSrc=FDL; RatingScope=DMS)',
                            'TR.IssuerRating(IssuerRatingSrc=FDL; RatingScope=FRN)'
                            ]
requesting with the following function 
rd.get_data(ids, fields, parameters={'SDate': start_date})
get_pricingdata(list(request_isins), fields_assetcategory,request_date) 
the function is a little bigger than you see here i just cutted it down for the understanding.
The issue now is, that the ratings do not work properly, all the other fields work perfectly, for the ratings i only get the same rating for all the 6 columns if there is one.