# SIGWARN System Variable [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [System Variables](Help%20System/GSTARCAD/2021/System%20Variables/(System%20Variables).md) → [S](Help%20System/GSTARCAD/2021/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 could 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 --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/S/SIGWARN%20System%20Variable--1944a5ff5f51.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/S/SIGWARN%20System%20Variable--1944a5ff5f51.md) · [GstarCAD 2018](../../../2018/System%20Variables/S/SIGWARN%20System%20Variable--1944a5ff5f51.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/S/SIGWARN%20System%20Variable--1944a5ff5f51.md) · [GstarCAD 2020](../../../2020/System%20Variables/S/SIGWARN%20System%20Variable--1944a5ff5f51.md)