In Check In Multiple Documents page, select "Include subfolders", but no files are listed out.
Modify the "List View Threshold" may solve this issue because it exceeded the maximum limit. Please check the two parts below:
List View Threshold:
- Go to Central Administration -> Application Management
- Select a desired web application, then click on ‘General Settings’ on the ribbon and select ‘Resource Throttling’, and change the settings below:
- Go back to General Settings in the ribbon, select ‘General Settings’ option
- Scroll down to the bottom, set the desired maximum upload size:
This solution also applies to the issue that after uploading documents, the page won’t redirect to the check in page.
Applies for: SharePoint 2013, SharePoint 2010, SharePoint 2007