Conductor Script Commands
The WaitForStartup command is available only when an engine is current, so you must first use the FindEngine Script command to set the current engine.
In a script, the WaitForStartup command is used after a StartUnit Script command. The WaitForStartup command causes the script to pause until the specified engine unit successfully starts up before continuing with subsequent Script commands. If the engine unit does not start up within the specified time, an error message is generated and the script aborts.
Appendix A Conductor Script Commands 325