It is possible to designate a transaction as a startup transaction. When a file is opened in OpenBuildings™ GenerativeComponents the transactions designated as a startup will play automatically. To designate a transaction as startup, in the GCScript editor, simply type (comma) , startup after the quote marks around the transaction name. Subsequently the transaction will be marked [STARTUP] in the transaction player. Deleting the , startup in the GCScript editor will revert the transaction to normal.

It is possible to include any number of consecutive startup transactions. OpenBuildings™ GenerativeComponents will play through all of these upon opening a file. A transaction designated as startup placed after a transaction not designated as startup will have no effect. Using the transaction player, it is not possible to play back into a startup transaction. It is however possible to edit a startup transaction in the GCScript editor, although it will be necessary to reopen the file to replay those changes.

transaction modelChange 'Graph Variables', startup
{
    node User.Objects.symbolSize Bentley.GC.NodeTypes.Expression
    {
	       Value                    = 3.0;
    }
}