When using the Erase geoprocessing tool from the Analyst Toolbox I get the following error "ERROR 999999: Error executing function. The geometry is not M-aware Failed to execute (Erase)."
With small subsets of my data, there's no problem running the tool, but when I run it on the entire dataset it seems to give me the aforementioned error. I have tried the following steps to try and fix the problem:
- Repair Geometry of both of my polygon shapefiles
- Turned off M-aware under my environmental settings
I am using ArcMap 9.31.