[NTG-context] mkiv: way to signal extra run(s)

Hi, just wondering. Is there a official way to signal ConTeXt from a module, that an extra run is needed? I started thinking about adding bookkeeping for the created run time graphics. Graphic related changes can then be detected and, if necessary, extra runs can be started to update the changed graphics. I need the second run to create and start the ImageMagick batch script, but the collected info in the *.tuc file prevents ConTeXt from starting a second/third run. Currently I use a batch file that simply deletes the *.tuc file and then calls 'context'. As there is no bookkeeping, all the graphics are recreated then. Peter