In a Niagara G3 station with a BACnet MSTP integration, the following error appears in the application director output: DCMD_MSTP_TX_FRAME returned 11 (errno 3)

[Product_Support]

Issue

In a Niagara G3 station with a BACnet MSTP integration, the following error appears in the application director output:

Transaction Timed out! invokeId 223 TransactionException in poll() for BacnetDevice {Kens_RM106}:pl=PollList [Kens_RM106 device:7219 3000:13] 196608025 {160} 10 PLEs)
DCMD_MSTP_TX_FRAME returned 11 (errno 3)
DCMD_MSTP_TX_FRAME returned 11 (errno 3)
DCMD_MSTP_TX_FRAME returned 11 (errno 3)
.... Hundreds & hundreds more

Environment

Niagara G3

Cause

MSTP trunk / traffic issues

Resolution

See the discussion about an identical issue at Niagara-Central.com.  Here is a link:  https://community.niagara-central.com/ord?portal:/discussion/DiscussionThread/11258