My running. envirement is bad

fire i delete some i cannot install package. how can i restore my envirement to default?


There is no ‘reset environment’ function, but you can reinstall any deleted library back using the Library Manager dialog.

Or you can just create a new workbook (it will be created with the default libraries) and copy/paste your code here.

Sorry, I missed this point:

Could you give me the details? Are any errors displayed? And what library are you trying to install? Thanks.