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documentation doesn't open in new window anymore

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Maaike van de Ven
Maaike van de Ven on 29 Mar 2019
Edited: Jan on 29 Mar 2019
When I want to search something in the documentation using the search bar on the top right or using doc in the command window the new window that usually opens doesn't open anymore. If you hover over the matlab icon on your task bar it does show an empty help window, but when clicking on it nothing shows up. I have matlab 2018a and windows 10.
matlabding.png

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Adam
Adam on 29 Mar 2019
If you can access the context menu for that Help window by right clicking on the ghost window on the right of your above screenshot try clicking 'Maximize' on it and see if it sorts itself out. I also had this problem once and was about to send a tech support request to Mathworks, but then just decided I'd click 'Maximize', just because it was there and suddenly everything was back working again with that window and future help windows opened with doc.

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Answers (1)

Jan
Jan on 29 Mar 2019
Edited: Jan on 29 Mar 2019
This has happend on my computer also after the preferences files have been corrupted. Re-create the preferences folder from your backup, see:
prefdir
It is something like:
'C:\Users\username\AppData\Roaming\MathWorks\MATLAB\R2018a'
Use the "recent versions" of the operating system or which backup you use.
If you did not create a backup of this folder - bad. But not a drama. You can re-create it easily: Stop Matlab, rename the preferences folder and restart Matlab. The preferences are re-created with default values. You have to setup your preferences again or you can try to move some of the files of the original folder to the freshly created one until you identify, which of the files let the help window disappear.
If it works and you have setup Matlab to your needs again: Create a backup of the preferences folder.
For all readers who do not have problems currently: Perform the last advice:
CREATE A BACKUP OF MATLAB'S PREFERENCES FOLDER
In your case it was the windows position of minimized state, which was saved to the preferences files. Of course using the "Maximize" function in the Windows selection is an easier solution. But a backup cannot be a disadvantage also: Answers: Backup of preferences folder

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