FPGA error -63195

[johnoc]

My application seems to run fine until I enable datalogging to a file from the host. My logging loop reads from a DMA FIFO and logs to the file. I do not use an FPGA read/write control in my datalogging loop.

The logging loop runs all the time as it is also my UI update loop. It updates the UI at 5 Hz.  No problems.

I enable datalogging to a file and I get the error referenced above. I am only writing to the file once every 10 seconds and it is not a large amount of data.

[mateh]

Hi John. Error -63195 generally means an invalid reference has been passed to an FPGA related node. Since this is a very old thread, it would be better if you created your own thread and attached your VI so that we can see exactly what's causing the invalid reference to get passed to the function.

[johnoc]

Thank you.

I understood the error. It just didn't make sense as to why I was seeing the error. Then I noticed that I wasn't passing my reference through to the shift register on two frames of my event handler. All is well now.

[Zyga]

Hi johnoc,
Did you find solution for the problem? Looks like in my application this error occures randomly from time to time. I can not find any related actions taken. Curious since my application worked fine for almost a year.

[johnoc]

Hi Zyga,

I wasn't passing my reference through to the shift register on two frames of my event handler. It would work fine unless I got one of the two events. If either of the events occurred the reference would be set to the default value of the shift register. Thus the reference would no longer be good when required.

[Manzolli]

Recompile the FPGA code. Worked for me.