Master Page error

Question

Why this error occurred.I have checked everything,there is no problem in code.
Master Page error
The page contains markup that is not valid  when attached to a Master Page.
Correct the problem in Codeview.

Manikavelu Velayutham · Answer

this error mostly occurs when there is an unclosed comments tag..........just check it out the comment tags closed well or not.......that could solve this error.
Let me know if the error still exists.

Manikavelu Velayutham · Answer

Its a bug already reported by microsoft. We need to install the SP1 to resolve this issue.

Suthish Nair · Answer

The same problem hits my team projects also.
The weird thing was i need to reinstall the VS application again, after that its started working.
But, for my team member he followed the workaround suggested on msdn , that helped.
I dont know this a bug or something else, but still happening with developers.

PankaJ D · Answer

Hello Manikavelu Velayutham  Sir.
I checked all comment tag,everything is fine.But still error  exists.