[Info-vax] OpenVMS - file selection abnormally with Copy / Rename or user ignorance?

[JF Mezei]

On 15-03-28 08:28, Stephen Hoffman wrote:

> FWIW, BACKUP /IGNORE=INTERLOCK — if that's what you are using — does 
> not reliably report collisions 

Is this because backup only checks for conflict when it starts to backup
a file , but wouldn't issue a warning about file being opened if the
other process opens it after backup has begun to access the file ?

Or are there other scenarios where backup doesn't report potential
problem because the file is opened by another process ?