Actually now I see that 

a4) poll_event() and interrupt_configure() have "source" as "int[]" instead of "int" (why did this work before?)

mention this already, but maybe it's not completely clear that one has to change "int[] source" to "int source"

Stefan


> We updated midas/examples/experiment/frontend.cxx to correctly contain
> 
> /*-- Interrupt configuration ---------------------------------------*/
> 
> INT interrupt_configure(INT cmd, INT source, POINTER_T adr)
> {
>    switch (cmd) {
>    case CMD_INTERRUPT_ENABLE:
>       break;
>    case CMD_INTERRUPT_DISABLE:
>       break;
>    case CMD_INTERRUPT_ATTACH:
>       break;
>    case CMD_INTERRUPT_DETACH:
>       break;
>    }
>    return SUCCESS;
> }
> 
> but if you upgrade from C to C++ from your own old frontend code you might be hit by that issue. 
> 
> Maybe Konstantin can update elog:1526 to contain a hint about "INT source".
> 
> Stefan