Cannot run FPGA VI by Host VI

[fengyanyang]

Hi,

I want to use host VI to communicate with FPGA and read data from it. At first I used DMA FIFO to transport data, but later I found some sync problem with this FIFO so I deleted the FIFO.read section in Host VI. But even when the host VI is as simple as the following, it still fails to run FPGA VI. I think I configure it right, and in simulation mode (with simulated I/O), it can run FPGA VI and I can see changes in the waveform charts in the front panel of FPGA VI. But when I change execution mode to FPGA target, it fails anyway and I don't know why. 

[Terry_ALE]

What is the error? How do you know it is failing to run the FPGA VI?

[fengyanyang]

The icon on FPGA VI front panel doesn't change to running mode, and I cannot modify the parameter for FPGA VI through read/write control in Host VI. 

But if I try clicking "run" on FPGA VI and then run the host VI, the latter can modify parameter for FPGA VI.