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How to sort out the below issue
What version of Internet Explorer are you using?
Internet Explorer 11.0 and creo 2.0
It looks like you might be running into the issue from CS150425. What maintenance release of Creo 2.0 are you using? IE 11 is only supported on Creo 2.0 M100 and later. Using IE 11 with Creo 2.0 M090 and earlier can produce the same error message that you are seeing.
set config.pro option
browser_limit_to_ie9_mode yes