/dev/comedi0: Bad address

Hi all

Thank you again for previous help.

I am getting a runtime error message: "/dev/comedi0: Bad address"

on exection of the line:
ret = comedi_data_read(device, subdevice, channel, range, analogref, data);
subdevice, channel, range and analogref are all set to 0.

the lines:
lsampl_t *data;
device = comedi_open(filename);
successfully executed.

"comedi_config /dev/comedi0 ni_picmio" has been run and the module has been
loaded through modprobe and shows up when I do an lsmod.

I had this line working before however it failed me after I was moving
around code to "clean" it up.

Any clue on how to get this runtime message to go away will be appriciated.

Im using:
comedi 0.7.73
kernel 2.6.15
with a NI 6221 card

BTW if anyone can recommend a good IDE for c(and maybe c++) I would be much
obliged.  The inability to retrace my steps is what got me in this jam in
the first place.

George