Delete query error could not delete from specified tables

i keerp getting an error "could not delete from specified tables"







I have a table with this data



Main table

bub|12345|1

bub|45678|2

bub|91011|3



Child Table

bub|45678|2



result in Main table



bub|12345|1

bub|91011|3



match from child table and delete from main table..

but i keep getting error "Could not delete from specified table

main table has unique records. and it is primary key..

please help

Delete query error could not delete from specified tables