IMediaControl:Run return E_INVALIDARG

in my code, i invoke IMediaControl::Run and Pause couple times. but sometime the function IMediaControl:Run return E_INVALIDARG, that is so wired, 开发者_开发百科the run function has no argument. can anybody help me about this;)

Most probably, this error code is returned from one of the filters in the graph, and that's being passed back to your app via the graph manager.