Try to backup db file with Butil continuous way no problem:

But when I use "sqlutil" do the same thing, get error massage:

sqlutil -startbu \pvsw\demodata\dept.mkd

Preparing files for continuous backup operation ...

Error: Data source name \pvsw\demodata\dept.mkd does not exist.

I even try c:\pvsw\demodate\dept.mkd, same error.

Anybody any clue.

Thanks in advance.

HG

The usage of SQLUTIL is:

sqlutil -startbu <Data Source Name | @ListFile> [/s
sqlutil -endbu <Data Source Name | @ListFile> [/s]

Notice that it's using a Data Source Name. So in your example, it would be:
sqlutil -startbu demodata

You don't specify a data file name when using sqlutil. You specify a data source name.

Got it, thank you.