TNC 530 TNC 640 Missing Tags in Ignition|OPC UA Standard|Forum|OPC Foundation

Hello all and thanks in advance for reading. 

I have three machines installed with OPC UA and being monitored using Ignition. Each one has a single missing tag, while all other tags are displaying properly. I am interested to know how to check on these tags to verify where the miscommunication is coming from. Any advice is appreciated. 

Machine 1 - TNC 530

NC - 340490 07 SP2

Missing Tag - CurrentNCProgram - No string displayed

Machine 2 - TNC 530

NC - 606420 02 SP10

Missing Tag - ExecutionState - always set to "Undefined"

Machine 3 - TNC 640

NC - 340590 06 SP4

Missing Tag - CurrentRunTime - null

Again, thank you for reading and I look forward to any input.