SDI System Variable

GstarCAD 2026 → System Variables → S

Function Description:

The SDI system variable is used to control the program running on a single file interface or multiple file interfaces.The SDI system variable can not be reset to 1 when multiple documents are already opened in the software.


Type	Integer
Saved in	Registry
Initial value	0
Range	0,1

System Variable Value:

0: opens multiple file interfaces.
1: opens a single file interface. And you will be prompted to save the current drawing, prior to opening or creating any other drawings.