Problem: ArcMap crashes when displaying labels
Displaying labels for a feature class crashes ArcMap.
The feature class being labeled contains non-simple or invalid geometry.
Solution or Workaround
- Use the Repair Geometry tool located in ArcToolbox > Data Management Tools > Features > Repair Geometry to loop through all features and verify that the geometry is valid or simple.
- If the data is in shapefile format, recreate the spatial index in ArcCatalog. For more information, refer to the following Knowledge Base Article: How to: Build a spatial index for a shapefile.
If the data is a geodatabase feature class, this step is not necessary. Geodatabase feature classes have spatial indexes by default.