Hi, I'm running queries on a Mac MERGE table using two Linux REMOTE tables and got for each query occasionally (1/10 times) the following identical error: (mapi:monetdb://monetdb@localhost/whalesdb) 'user.l2' undefined in:     (rmt1094_X_2_bat_oid_str:bat[:oid,:str],rmt1095_X_5_bat_oid_wrd:bat[:oid,:wrd]) := user.l2(); The same queries on the same data set but from Linux to Linux produces also occasionally (1/10 times) a similar but different identical error: (mapi:monetdb://monetdb@localhost/whalesdb) 'user.l1' undefined in:     (rmt438_X_3_bat_oid_str:bat[:oid,:str],rmt439_X_6_bat_oid_str:bat[:oid,:str],rmt440_X_7_bat_oid_int:bat[:oid,:int]) := user.l1(); Per default the connections are via SSH tunnels though direct access via remote IPs, and also local IPs where possible, gives the same results. The tables are generated using R and are having currently still having CHARACTER LARGE OBJECT as data types (in case that matters). As pointed out already only 1 out of 10 times the queries are run the error messages are shown. Has someone else come across problems like these? Thanks. Kind regards, Bart