Troubleshooting labview for motion control

[mechanical Engineer]

I use labview for establishing a 1-d straight line movement for a small dc-motor, i have a PCI-7430 controller and UMI_7774, but after i wrote the code on labview, an error appear,contains the following: error 70006 occured at load velocity(the sub vi called load velocity), and then the message show the possible reasons for this as follows: an invalid axis or other resource ID

[VuD]

Ni-motion in labview,

I see that this issue is already being discussed in a different thread.  In the future, if you have two similar questions, please keep them within the same thread so that we can answer them in a concise manner.  Thanks.

Best regards,

Vu D