WD Mobile 23 Android complier error

Error returned:

:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclFieldMangers.java:27: error: duplicate class: com.mycompany.cabinettrac.fm.wdgen.GWDCstTechList
class GWDCstTechList extends WDStructure
^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclUser.java:28: error: duplicate class: com.mycompany.cabinettrac.fm.wdgen.GWDCstStoreList
class GWDCstStoreList extends WDStructure
^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDFWIN_Form_Calendar.java:39: error: duplicate class: com.mycompany.cabinettrac.fm.wdgen.GWDCstCal
class GWDCstCal extends WDStructure
^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDFWIN_Form_Calendar.java:96: error: duplicate class: com.mycompany.cabinettrac.fm.wdgen.GWDCstTechList
class GWDCstTechList extends WDStructure
^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDFWIN_Popup_DevSuper.java:36: error: duplicate class: com.mycompany.cabinettrac.fm.wdgen.GWDCstList
class GWDCstList extends WDStructure
^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclCalendar.java:688: error: 'void' type not allowed here
vWD_sTech.setValeur(fWD_cm_Cal_GetTechName(WDAPIHF.getFichierSansCasseNiAccent("qry_calendar_outgoing").getRubriqueSansCasseNiAccent("tech_id")));
                                          ^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclCalendar.java:1680: error: 'void' type not allowed here
if(mWD_m_nFileVersion.opDiff(fWD_cm_Update_GetVersion()))
                                                     ^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclCalPrint.java:381: error: 'void' type not allowed here
vWD_nColNum.setValeur(fWD_cm_GetDayNumber(mWD_m_arrData.get(vWD_i).checkType(GWDCstCal.class).mWD_nDayNum));
                                         ^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclCalPrint.java:384: error: 'void' type not allowed here
vWD_nWeek.setValeur(fWD_cm_GetRowNumber(mWD_m_arrData.get(vWD_i).checkType(GWDCstCal.class).mWD_nDayNum));
                                       ^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclUser.java:533: error: 'void' type not allowed here
mWD_m_sStoreName.setValeur(fWD_getStoreNameByStoreID(mWD_m_nStoreId));
                                                    ^
C:\My Mobile Projects\CabinetTrac FM Android v23\Android\Gen\src\com\mycompany\cabinettrac\fm\wdgen\GWDCclUser.java:570: error: 'void' type not allowed here
mWD_m_sStoreName.setValeur(fWD_getStoreNameByStoreID(vWD_nStoreID));