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Apr
20
awarded  Popular Question
Apr
6
comment ! Undefined control sequence. l.52 \char_make_active:n {"20}%
I switch to TeXclipse and it works now, it seems weird because all TeX IDEs use the same compiler so I really don't understand why. Anyway, thanks for your concern.
Apr
6
awarded  Student
Apr
5
comment ! Undefined control sequence. l.52 \char_make_active:n {"20}%
Here is the log file I'm using MikTeX 2.9 (newest version I believe) on Windows 7.
Apr
5
asked ! Undefined control sequence. l.52 \char_make_active:n {"20}%