In case you're facing errors related to screen SAPLSUID_MAINTENANCE 1100 or SAPLPRGN_TREE 0121 when using Batch Input in SU01 or SU10, especially after upgrading to SAP NetWeaver Release 7.3, please be advised that this might be due to the infrastructure changes promoted in this release.
For further details please see note 1864062 - Problems using Batch Input.