Failure of Split_analysis to export all polygons

Discussion created by tcg1 on Mar 17, 2011
Latest reply on Mar 18, 2011 by bbicking-esristaff
For the first time today I attempted to split a large dataset into smaller pieces using the Split_analysis tool.  I am attempting to split an entire statewide shapefile into county by county pieces.  Here is my code as entered in the Python window:


The statewide shapefile is "blk" and "CNTY" is the county FIPS code attached to each census block.

Running the command does indeed produce output for each selected county, but only a small number of blocks from each county make it into the output shapefile (easily less than 10% of the features).  Is there some limit to this operation or is there some other explanation?