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this page doesn't run ! what is the problem here in package

  • 3
    Please prepare a minimal working example (MWE) that allosw others to reproduce the output you get. Showing code as an image makes it quite hard to test suggestions.
    – leandriis
    Jan 24, 2021 at 16:44
  • Probably unrelated, but regarding your use of $$, you might nevertheless want to take a look at What are the differences between $$, [, align, equation and displaymath? and Why is [ … ] preferable to $$ … $$?
    – leandriis
    Jan 24, 2021 at 16:45
  • 3
    It looks like the document class may fail to define a page style called myheadings. Which document class do you employ?
    – Mico
    Jan 24, 2021 at 16:48
  • 1
    you are trying to compile the chapter file. Set the main file as "main file", so that it is compiled. Jan 24, 2021 at 17:46
  • 4
    I’m voting to close this question because I'm voting to close this question because suggestions given i comments were acknowledged by OP to solve the problem. Jan 24, 2021 at 20:46


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