RobotStudio event

Start Rapid Execution issue by using Robot Web Services 1.0

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Hi there:

I want to use Start Rapid Execution function, I have requested mastership, and listed all 6 data params, when I post Start Rapid Execution url, I got feedback of 204, but robot don't have any reaction. Does anyone know what could be the problem, or share with me a sample, thanks in advance!

Wise