Niagara R2 UNC Time Inaccuracy – Error Loading timezones.txt

[Product_Support]

Issue

A Niagara R2 UNC does not keep time accurately. The time does not simply drift by seconds; it jumps by hours. Attempts to change the time using the Admin Tool fail. On startup, the Standard Output Window displays:

ERROR: Cannot load /tffs/rel//nre/lib/timezones.txt
java.lang.NumberFormatException

Product Line

TAC IA Series

Environment

Niagara R2 UNC

Cause

The timezones.txt file on the UNC is corrupt, preventing proper time synchronization.

Resolution

Replace the corrupt timezones.txt file with a valid copy from a functional UNC:

1. Access the file via the Admin Tool dropdown menu.
2. Copy the contents of timezones.txt from a working UNC.
3. Paste the contents into the problem UNC.
4. Restart the station to confirm accurate timekeeping.