I have an error to configure the PCI 4451 (Function DAQ_Op)

[PCI 4451]

The NI DAQ 7.3, Labview 6i, Labview 7.1 and PCI 4451  was instaled in my computer.

I did an application named "PCI4451_Leitura_call.vi" in Labview 7.1 to access the board but a error occurred.

I called nidaq32.dll in LabVIEW and selected the function AI_Change_Parameter. Its works, but the function DAQ_Op isn't. The message below was showed. 

Message:

LabVIEW: An exception occurred within the external code called by a Call Library Node. This might have corrupted LabVIEW's memory. Save any work to a new location and restart LabVIEW.

VI " PCI4451_Leitura_call.vi" was stopped at Call Library Function Node 0x2D28 of subVI "PCI4451_Leitura_call.vi"

Can you help me?

[NatasaLingurovska]

Hi PCI 5411,

The problem is due to incorrect default setting of some of the parameters for Daq_op function. Please refer to this knowledge base (kb) for more info about this issue. Also, try running the example code attached to the KB and see if you can replicate the problem or isolate where the error occurs.

I hope this helps.