Brosilav,

Thank you for the response, I really appreciate it.
No, I do not have anybody opening any table exclusively through my application.

The command:

rlock("0","stafile")

is correct based on the second option which is [cRecordNumberList, nWorkArea | cTableAlias])

I am trying to lock the file header in order to insert a record into the table.

I do issue a message if any save failed, that's one way they know that they are losing data.

Thank you again for your kind response,

Dawa

************************** Response to ********************************

Dawa,
Is there anywhere in your application that the table Stafile is open exclusive? May be one user attempt to insert a record therefore other is open that table exlusive, doing some REINDEX or PACK...
By the way according to help the right sintax of RLOCK is:

RLOCK([nWorkArea | cTableAlias] | [cRecordNumberList, nWorkArea
| cTableAlias])
so you must change

if rlock("0",'stafile')
to

if rlock('stafile')
In addition, You can put a messagebox before ROLLBACK to annonce to user that no changes is commited