Issue
The current version of Migration Manager does not have specific support for InfoPath forms libraries and treats them as simple document libraries. By default forms libraries are excluded from the migration.
How to fix
To be able to migrate Forms Library comment out or delete the <Exclude Type="115" Description="Form Library"/> line in the %Installdir%\MigrationConsoleConfiguration.xml file, restart Quest.MM4SP.ServiceMonitor and repeat the migration.
Commented line should look like:
<!--Exclude Type="115" Description="Form Library"/-->
Contact Migartion Manager dev team or Quest support for more detailed information.
Note:
The forms library template has not been preserved during migration, the target forms libraries will havewith the original empty template. So, you'll need to link it on the target site manually. Read the following article about changing form template for 2007 site.
MM does not process form XML files and they have link to a source template. You may get thу issue when users could not open forms on target site when the corresponding source template unavailable.