PCI Express to External Memory Reference Design Qsys(Arria II GX): Data Verify Failed

[Altera_Forum]

Hi 

 I am trying to run the reference design with the guide of an433.pdf.    In the PCI Express Demo Application, When i select the run Onchip DMA Test or DDR DMA Test with the following setting: - PC > FPGA - Enable the check data   It always shows that data verify failed. Is there any possible reason will cause this?   Is the item below will cause the issue: 1. The pcie slot on PC motherboard is x16 and the pcie on arria ii dev kit is x8 2. Ignore the found new hardware wizard after the arria ii dev kit is plugged onto PC pcie slot   Thanks

[Altera_Forum]

I believe it shouldn't related to the slot where you inserted. I've tried using the x16 slot but no trouble. 

 Was the board detected correctly on the GUI? The other direction worked for you? sounds like you are having issue on the PC to FPGA direction only?

[Altera_Forum]

I have no idea whether it is detected correctly. It seems to me is correct. It only happens from PC to FPGA only. The FPGA to PC is working fine. 

 This issue has been solved by replug-in, reprogram and install the jungo driver during found new hardware wizard.    Thanks

[Altera_Forum]

Are you using the Arria II dev kit and left all the settings alone? If so which north bridge are you connecting the dev kit to? 

 The only issue with that design I know of is when someone changed the transfer size and a 16MB boundary was crossed which I'm told is not allowed in PCIe (I'm not expert in PCIe, I only know the DMA in that design).

[Altera_Forum]

Sounds like it was just issue with loose connection? based on what the woeichee said?