# SIGWARN System Variable [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [System Variables](Help%20System/GSTARCAD/2022/System%20Variables/(System%20Variables).md) → [S](Help%20System/GSTARCAD/2022/System%20Variables/S/(S).md) ## Function Description: The SIGWARN system variable is used to control whether to send warning when opening a file attached with digital signature. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | When this system variable is on, it displays digital signature status when opening a file with valid digital signature. When this system variable is off, it only displays digital signature status when opening a file with invalid digital signature. Users can use Open and Save tab in Option dialog box to set this system variable by Display digital signature information option. ## System Variable Value: **0:** do not send warning when opening a file with valid digital signature **1:** send warning