If you use e.g. a DATA-step the dataset is locked as long as the step is running. SHARE is ok, if you are working with a kind of record locking. E.g. FSVIEW or FSEDIT do such things. If you are in FSVIEW, you should NOT use "modify member", because this locks also the whole dataset. Instead you should use modify record. The marked record is locked as long you are working with it. Also with SAS/AF and /EIS you can use such features. You should not expect such miracles, you seem to think of! Also databases, which can work with record locking do not allow updates while a table is loaded for example. However I think, SHARE is able to provide some services which allow you to wait for a locked dataset until it is free. You should refer to the manual for that.

In your case a file-lock is necessary, because you can only add a new variable by rewriting the whole dataset. For such "reorganizations" concurrent access is not possible!

On Wed, 16 May 2001 13:48:16 +0100, Graeme Kirton <gkirton@FILCS.COM> wrote:

>Hi folks, we've just aquired SAS/Share here because it was apparently all the >answers to our concurrency issues. I've now set this up to what I belive was >correct, only as a test I opened a remote.dataset in viewtable, then on another >session I tried to create a new variable on that remote.dataset etc. All I got >was a file-lock multi-user access error. I thought share would manage this??? > >Cheers >Graeme >___________________________________________________________________________ _________________________________ > >Disclaimer > >This email may contain privileged/confidential information and/or copyright >material. It is intended only for the use of the person(s) to whom it is >addressed and any unauthorised use may be unlawful. If you receive this email >by mistake, please advise the sender immediately by using the reply facility on >your email software and delete the material from your computer. > >Opinions, conclusions and other information in this email that do not relate to >the official business of this organisation shall be understood as neither given >nor endorsed by it. > >If this message forms part of a quotation, the quotation is an invitation to >treat only. No contract subsists until Filtronic Plc (or its subsidiary >companies) accepts your order. Acceptance of your order is made subject to our >standard Terms and Conditions. > >Website Address http://www.filtronic.com