cRIO RT application freezes

[Monza]

I have still not solved the problem, but at least I've found that the hangup is related to TCP communication between target and CVI host. The target is working fine as a standalone without the CVI host connected. I am transferring small blocks of data's of maximum 300 bytes from target to host every halv second.

Anyone who knows if there are any known issues in TCP communication between LV RT target and CVI host?

Please help!

[TerraNova]

Well, the thing is in your network setup - at least, this is the most probably.
- Any firewalls etc on the Host?
- The reason also may be in the speed setups (should use "auto" on RT and Host in LV 8.0 and higher) and protocol bottlenecks (also can be corrected on RT and Host).
- And (hope not your case ;)) look for rude VI calling method mistakes.

Anyway, write back - we'll try to work it out.

[Monza]

Thanks for your answer!

"- Any firewalls etc on the Host?"
I don't have any firewalls on my host computer.

"- The reason also may be in the speed setups (should use "auto" on RT and Host in LV 8.0 and higher) and protocol bottlenecks (also can be corrected on RT and Host)."
How to set up speed? I have not seen any speed setup in MAX. Are there also any settings on CVI host?

"- And (hope not your case ) look for rude VI calling method mistakes."
I'm quite sure that my code is ok, I've made a simple test program based on NI example code. The problem seems to be related to network traffic. The problem occurs only when host and target are connected to our LAN, and the problem disappears when host and target are disconnected from rest of the LAN (using just a switch with only host and target connected to switch).

Best regards,
Per