All alarm codes
ALARM 442
Data Renewal Not Allowed
Part program number referenced by the operation is missing — the trailing 3210 in the alarm string ( 6, 3, 3210) is the missing program number.
- Controls
- Mazatrol 640T
- Machine series
- Mazak lathes on M640T
Causes
Part program number referenced by the operation is missing — the trailing 3210 in the alarm string ( 6, 3, 3210) is the missing program number.
- Fabian Achavalyoutube
In parentheses ( 6, 3 , 3210) last part refers to part program number missing.
- Fabian Achavalyoutube
How to clear it
- 1
Read the last value in the alarm parenthesis — that is the missing program number. Restore the program (from backup, USB, or DNC) and retry.
- Fabian Achavalyoutube
In parentheses ( 6, 3 , 3210) last part refers to part program number missing.
- Fabian Achavalyoutube
Confidence: high · Source explains the alarm syntax (how to read the parentheses values) which is the actionable insight.
First sourced: 5/21/2026