Hey guys, I have a large customer file and I'd like to attach a block 
group id to each customer based on their lat/lon.  The problem is that 
when I try to "tag" the block group id the program runs for 30+ hours 
and then errors with "illegal memory reference."  I assume it's 
because the file is so large since I can tag block group id on smaller 
files.  

Can anyone tell me how to cut a large file up into many smaller files?
thanks!
mark





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