# Check
## Check
The **Check** command in Rhinoceros 3D evaluates selected objects for errors in their data structure and generates a detailed report to help diagnose potential geometry issues.
**How It Works:**
1. **Activate the Command:**\
Type `Check` in the command line or select it from the Analyze > Diagnostics menu.
2. **Select Objects:**\
Choose the objects you want to analyze.
3. **Review the Report:**\
Rhino generates a detailed report, listing any errors or irregularities in the selected objects' data structure.
**Purpose:**\
This command is used to ensure the integrity of model geometry, making it easier to identify and troubleshoot problematic objects.
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Check
The **Check** command in Rhinoceros 3D evaluates selected objects for errors in their data structure and generates a detailed report to help diagnose potential geometry issues.
**How It Works:**
1. **Activate the Command:**\
Type `Check` in the command line or select it from the Analyze > Diagnostics menu.
2. **Select Objects:**\
Choose the objects you want to analyze.
3. **Review the Report:**\
Rhino generates a detailed report, listing any errors or irregularities in the selected objects' data structure.