Hi,

We are experiencing an error on submission of a Form.  The form submits fine and the Thank You page is displayed, but in the event log and in the bp_instance_errors table in the Forms database there is a DBUpdateConcurrencyException message: Store update, insert or delete statement affected an unexpected number of rows (0).

This is intermittent and only happens after a Save and Resume.  The problem is that the dataset seems to disappear from the cf_submissions table - I was hoping that maybe the draft data would remain and be recoverable.

Is this something that anyone else has seen or could suggest where i look next to identify the source of the problem ? 

From investigations so far the error seems to be suggesting that there may be multiple versions of the form open (hence a possible conflict due to different data in memory for the same form).  I don't think this is the case, but even if it was shouldn't an old copy of the data survive in the database ?

thanks,

Ian