Hi Donna,
I can't reproduce this issue. I can split line features that are part of a feature dataset with no issue. Is this feature class specific, feature dataset specific, geodatabase specific? How to find out:
- If you create a new line feature class in the same feature dataset and create a new line and attempt to split it, do you get the same error?
- What happens if you create a new feature dataset and copy the original line feature class to it?
- What happens if you create a new line feature class in the new feature dataset?
- What happens if you create a new geodatabase and do the same?
Once you narrow down the issue, perhaps a call to Esri Technical Support is in order? Esri Support Contact Support
Let me know.
Thanks!
-Scott