A newcomer to ACE, using ACE 1.x with VB6 Two input tags from HTML interface change every half hour. I am trying to write the value of these two tags to two output tags but with the timestamp changed to some time in the past, normally within the last hour, based on the number of minutes past the hour of the initial tag change i.e. if it occurs in the first half hour subtract the minutes plus 30 from the timestamp, otherwise use the minutes and subtract from the timestamp. The standard code set up by ace does the putvalue baed on the current calculation time, via the SetTimeStamp() routine. Can anyone suggest a way to change the timestamp to a different value and then write it back to PI?