Using DAQmx to close relays

[mcoursen]

I'm using a pxi2527 car to control a resistance signal across a 4 wire RTD.  In my VI i have set up the topology of the card to a "4 wire 16x1 Mux".  If I have reviewed this topology correctly then when software channel 0 is selected to close, then also software channel 16 should close.  I am never completeing the close of channel 16.  In NIMAX i can view that channel k0 is closing, but k16 does not.  Likewise, when i read the resistance across channel 16 i do not receive any signal.

I went an alternate rought and tried to close both relays for channel k16 and channel k0.  Again, i am having no luck with the closing of channel k16.  If anyone can make out what i am doing wrong, i would greatly appriciate it.

I have attached a screen shot of the section of my VI that controls which relays should be closed.  It indexes an array that includes all the channels from slot 3 and slot 4.

The array that i am indexing is here.

 

I couldn't get the whole thing but Slot 4 is alligned the same as slot 3

Channel 16 = pxi1slot4/k16

Channel 17 = pxi1slot4/k17

Channel 18 = pxi1slot4/k18

Thanks,

Matt