Problem running NI 9401 for counter input and output

[Peter.B]

Hi, 

I am using 2x 9401 modules with a NI cDAQ 9174 on Labview 2018, and am having trouble configuring these modules for both input and output. 

Below is the code I have been using.  Whenever I run the program, either the input signals work OR the output works, depending on which one I try to reserve/start first.  When I split it into 2 different programs, each one individually runs fine.  

I am getting Error -50103

"The specified resource is reserved.  The operation could not be completed as specified."

below is an image of my code, and I have also attached the VI

[Noah.B · Accepted solution]

Hi Peter,

I think this issue with both modules referencing ctr0. Try to change the counter referenced by the bottom most task to ctr2.

Let me know if this helps with your error.

All the Best,

Noah B. 

Applications Engineer

National Instruments

http://www.ni.com/support

[Peter.B]

Yes, that works perfectly! Thank You