concurrency-violation

anyway see why I get this "Concurrency Violation" in these few lines of code??? Concurrency violation: the UpdateCommand affected 0 of the expected 1 records

Here is the code, any ideas why I get this error? private SQLiteDataAdapter DA_Webfiles; // Setup connection, fill dataset etc DataTable dt = this.dataSet.Tables["WEBFILES"]; DataRow newRow = dt.NewRow(); newRow["PATH"] = _url; dt.Rows.Add(newRow); this.DA_Webfiles.Update(this.dataSet, "WEBFILES"); // Works to Here newRow["CONTENT_TYP...

Issues in Ada Concurrency

Hi I need some help and also some insight. This is a program in Ada-2005 which has 3 tasks. The output is 'z'. If the 3 tasks do not happen in the order of their placement in the program then output can vary from z = 2, z = 1 to z = 0 ( That is easy to see in the program, mutual exclusion is attempted to make sure output is z = 2). WIT...

Concurrency violation: the DeleteCommand affected 0 of the expected 1 records.

I'm building a software that uses an access database connect by the Vb.net 2008 data connection wizard... i wish to perform basic navigations....all i need is a standard insert, update and delete commands that would allow me save and delete records without throwing any "Concurrency violation: the DeleteCommand affected 0 of the expected ...