Hello! For some testing purposes, I created a file with 63.158.399 rows and tried to load it into a table with following structure: create table logtest ( id bigint, dim_year smallint, dim_month smallint, dim_day smallint, dim_hour smallint, dim_min smallint, dim_sec smallint ); I loaded the data in pieces of 20.000.000 rows with the 'copy into' command. At the last 3158399 there was an error, the connection to the server terminated, the server crashed. I restarted the server and the error message ERROR: HEAPextend: failed to extend to 480000000 for 01\14\11401tail was displayed. I tried to restart again, but its not possible anymore, the server immediatly returns and there is no error message... C:\MonetDB\MonetDB5>MSQLserver.bat # MonetDB server v5.14.2, based on kernel v1.32.2 # Serving database 'demo', using 1 thread # Compiled for i686-pc-win32/32bit with 32bit OIDs dynamically linked # Copyright (c) 1993-July 2008 CWI. # Copyright (c) August 2008-2009 MonetDB B.V., all rights reserved # Visit http://monetdb.cwi.nl/ for further information #warning: please don't forget to set your vault key! #(see C:\MonetDB\MonetDB5\etc\monetdb5.conf) # Listening for connection requests on mapi:monetdb://127.0.0.1:50000/ # MonetDB/SQL module v2.32.2 loaded I know I can reinstall the server, but I would like to know the problem. Are there too much rows for the logtest table? There are about 10 other tables in the database, with 10 - 100 rows. As you can see from above, I'm using windows vista, 32 bit... The current size of the dbfarm folder is 1,52 GB, and the size of the file I tried to load is 1,72 GB. Thank you, Wilfried