The connection to the data source "Database_Name" could not be established

i saved items in tables but after certain number of entry it showing flowing error

The connection to the data source “store” could not be established.
with following error
SQL Status: S1000
Error code: -78
error in script file line: 33 out of memory

how to solve this problem, as i cant enter further data to it…

Use of Split HSQLDB this problem is over come