title: VBA Excel: Module visible in the project explorer, but not the code window
body: <p>I'm on Windows 10, Excel 2016. </p>
  
  <p>I have a project I've been working on for quite a while. It consists of a userform and two modules. Now, after a week or so, I've opened the Excel file containing the code again. I see the modules and userform in the project explorer; I can view the code of the userform and one of the modules. However, the other module doesn't show me the code window. I double click on it and it doesn't appear. </p>
  
  <p>When double clicking on the module, the module name (under module properties, below the project explorer) does change. However, if from there I try to change the name of either module, I get the error message "Can't perform requested operation". Changing the userform's name works. </p>
  
  <p>Any idea what I can do about this? </p>