After a few mails with Ferdinand I switched to a Tag plugin solution. This does the job perfectly.
So the solution was not to use an Object data solution but a TagData.

Thanx!

Hi,

In short I build a plugin that's the same as the tiling camera in de C4D Lib. However the plugin does not update when it is not selected. Same thing when I render. How can I update / execute the plugin on every frame or change in the viewport like an xpresso tag for example.

Below a small part of the code. The tiling camera is just 1 function of many.

class RAARCGEN(plugins.ObjectData):
    if licenpass:
        include ('id')
        include ('reninit')
        include('iconchange')
        include('initvar')
        include('finalrender')
        #include('proxy')
        hashpass=False
        def __init__(self):
            self.SetOptimizeCache(True)
        def Message(self, node, type, data):
            data = node.GetDataInstance()
            #for name in searchNames(type):
            #    print type, name
            global doc
            doc = c4d.documents.GetActiveDocument()      
            if type==c4d.MSG_MENUPREPARE:
                InitVariables(doc,data)
            elif type==1036465: #trigger for placing object in the include/exclude field
                RelisInExc(doc, data)
            elif type==1036464: #trigger for removing object in the include/exclude field
                RelisInExc(doc, data)
            #elif type==431000094 or type==c4d.MSG_DESCRIPTION_COMMAND:
               #updatemodule(node,self)
            return True
        
        def Init(self, node):
            print ("test")
            return True
        
        def GetDEnabling(self, node, id, t_data, flags, itemdesc):
            data = node.GetDataInstance()
            if data is None: return
            ID = id[0].id
            updatemodule(node,self)
            #if (ID==FR_MAN):
            #    updatemodule(node,self)
            if (ID in {RENDER_ENGINE , RENDER_Q , GI_ENABLED , AO_ENABLED,FR_RENDER_Q} ):
                if data.GetBool(REN_BOOL) == False: return False
            if (ID in {MY_SUBBOX} ):
                if data.GetBool(ONOFF_ENABLED) == False: return False
            if (ID in {FILELOC , FILENAME , FILESUB , DESKPATH, FILCUST, FILEPATH} ):
                if data.GetBool(FILE_BOOL) == False: return False
            if (ID in {CUSRENTEXT , RENDER_SIZE , CUSSIZEW , CUSSIZEH, CUSRATIOLOCK, CUSRENUNIT, CUSRESO , BACKRENFILE , BACKRENRES , BACKRENVIS, FR_RENDER_SET ,TILINGCAM,TILINGR,TCAMSRC,TCAMTAR,CAMAXIS,RENDER_SIZE_TILE,FRAME_SELEC,MFRAMESEL}):
                if data.GetBool(SIZEMAN) == False: return False
            if (ID in {ABOUT_TEXT} ):
                return False
            if (ID in {PROXY_BOOL}):
                if data.GetBool(PROXY_BOOL)==False:
                    checkLayer = doc.GetLayerObjectRoot().GetDown()
                    while checkLayer:
                        if checkLayer.GetName() == 'Proxy viewport' or checkLayer.GetName() == 'Proxy render':
                            newLayer = checkLayer
                            newLayer.Remove()
                        checkLayer = checkLayer.GetNext()
            if (ID in {FRPROXYFORCERENDER,PROXYFORCEVIEW,PROXYFORCERENDER,OBJECT1_BOOL,OBJECT2_BOOL,OBJECT3_BOOL,OBJECT4_BOOL,OBJECT5_BOOL,OBJECT6_BOOL,OBJECT7_BOOL,OBJECT8_BOOL,OBJECT9_BOOL,OBJECT10_BOOL,
                       PROXY1,PROXY2,PROXY3,PROXY4,PROXY5,PROXY6,PROXY7,PROXY8,PROXY9,PROXY10,
                       OBJECT1,OBJECT2,OBJECT3,OBJECT4,OBJECT5,OBJECT6,OBJECT7,OBJECT8,OBJECT9,OBJECT10}):
                if data.GetBool(PROXY_BOOL)==False: return False
                  
                     
                return True
            return True
            
if __name__ == "__main__":
    if licenpass:
        path, file = os.path.split(__file__)
        bmp = bitmaps.BaseBitmap()
        bmp.InitWith(os.path.join(path, "res", "Fire_base.png"))
        plugins.RegisterObjectPlugin(id=PLUGIN_ID, str=PLUGIN_NAME,
                                    g=RAARCGEN,
                                    description="raarc", icon=bmp,
                                    info=c4d.OBJECT_GENERATOR)
    

Many thanx in advance