Hi all, Could someone please check the following behaviour of uVision 2.31 (C51 7.01)? If in the Options for Target... dialog you switch from the "Target" tab to the "Device" tab and then back to the "Target" tab, some of the options are lost. For example, if the device is a SAB80C517A from Infineon, the "Use On-chip Arithmetic Unit" and "Use On-chip XRAM" check boxes are unchecked. Thanks in advance, Jose