Getting "BATproject: does not match always"

My schema is: create table my_table (col_a date, col_b varchar(1024), col_c varchar(128), col_d varchar(128), col_e varchar(128)); I have approx 5,000,000 entries. The following queries not work: select count(col_b) from my_table; select distinct(col_b) from my_table; select 1 from my_table group by col_b; Giving the error: GDK reported error. BATproject: does not match always They work fine on all other fields. I don't know precisely what triggers this. I've tried to create some small sample values but I can only reproduce this on my large data set. I'm actually trying to do more interesting aggregation, but this is a minimal way to trigger the error. I'm using Jan2014-SP2 on Mac OS X 10.9.2 . Thanks Joe