Error message: The form submission cannot be processed because it exceeded the maximum length allowed by the Web administrator. Please resubmit the form with less data is reported for certain files. How do I resolve this problem?
Applies to: Dockit Migrator for SharePoint 9.x, 8.x, 7.x
The Maximum Upload Size configured for the corresponding SharePoint web application by the SharePoint Administrator is the most common reason for this error message.
By default, the Maximum Upload Size will be 50 MB. If the file size exceeds this limit, SharePoint server denies the file to be uploaded and returns this error. To resolve it, you must increase Maximum Upload Size to the required size and try importing the file again.
You can refer http://support.microsoft.com/kb/822059 article for details about Maximum Upload Size.