Two extra questions, conserning database recover
I made two following things and bought failed
The idea was to keep right valid contaner being frosen in project with different name

1 I included database 3 files dbc dbt dbx with different names , than real database , but really same content in project, made them being frozen in exe
and tryed to make copy ( copy file command) these frozen files outside on the disk.
Programm said , there is no such file.
Could I make frozen files copy outside?
2 I did same frosen database files, opened them like read
tables-use mydb.dbconly
and made copy to *.db*. It worked and did me 3 files with right extension
, but, when I tryed to open them like database, I observed message-it is not database container
I compared initial database with these new files field to field and did not detected any difference
What means , the difference is somewhere in file header.
I I could use one of these decisions, I made me very easy problem solution
Best wishes, Vladimir.