SQL Error (1442): Can't update table 'table_name' in stored function/trigger because it is already used by statement which invoked this stored function/trigger.
It does not go away, clicking on any randome table or anything, on tree view pops up this same message. Until you select data or something from that newly selected table.
Looks like error message 'has the focus' and it does not let go.
Optionaly general error ocurs or HSQL crashes completely, that is, forinstance tree viev becomes disabled, ...