I am getting a generic 999999 error trying to create a line buffer in 10.2.1 against a feature class that is in a projected coordinate space. It will work when using the Round option bu@@t not when using the Flat option. Is this a known issue? It was working with ArcGIS 10 and I just upgraded to 10.2.1 and now same code generates the error. It will also work (Round or Flat) if using GCS NAD27.
Coordinate System below.
|Projected Coordinate System:||NAD_1927_UTM_Zone_15N|
|Geographic Coordinate System:||GCS_North_American_1927|