RTI-815 analog input problem

Hello,

I am trying to use an RTI-815 with comedi-0.7.73 and comedilib-0.7.22. I
have not compiled it with real time support.  The demo program INP works
correctly reading the AI,DI and DO registers.  I get an input/output error
when attempting to read AI.  INPN, TUT1 and TUT2 give me results that make
no sense, way beyond 12 bit results.  Is there a sequence of events that has
to occur before using analog input?  Searching the archives it looks like
this card doen't support commands.  Am I not able to use these test programs
with this card?  Also, does anyone have a sample snippet using this card for
analog input?  I am just plain confused.

 

Thank you for any assistance in advance,

 

Tony