# REBUILDU System Variable [GstarCAD 2017](Help%20System/GSTARCAD/2017/Index.md) → [System Variables](Help%20System/GSTARCAD/2017/System%20Variables/(System%20Variables).md) → [R](Help%20System/GSTARCAD/2017/System%20Variables/R/(R).md) **Function Description:** The REBUILDU system variable is used to control the grid number in U direction of rebuilding NURBS surfaces. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 6 | | Range | 2 \~ 32767 | --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/R/REBUILDU%20System%20Variable--5609bdf64463.md) · [GstarCAD 2018](../../../2018/System%20Variables/R/REBUILDU%20System%20Variable--5609bdf64463.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/R/REBUILDU%20System%20Variable--5609bdf64463.md) · [GstarCAD 2020](../../../2020/System%20Variables/R/REBUILDU%20System%20Variable--5609bdf64463.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/R/REBUILDU%20System%20Variable--5609bdf64463.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/R/REBUILDU%20System%20Variable--5609bdf64463.md)