You'll have to recheck your code. Set a breakpoint and look at the threads
window. You are definitely accessing the UI from the background thread
somewhere. ProgressChanged and RunWorkerCompleted are raised on the UI
thread. (Which is why InvokeRequired returns false.)

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Josh Einstein
Einstein Technologies
Microsoft Tablet PC MVP
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"Pieter" wrote in message
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"Josh Einstein" wrote in message
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Your error message here is the same thing Dmytro said about cross-thread
UI calls. Something you are doing in DoWork (which is in a background
thread) is modifying the data grid.

Well actually it isn't :-/
And I don't have the exception while the Dowork is performing its actions:
it happens when the ProgressChanged-event fires...