You cannot generate an RSoP report by using the “gpresult /h” command in Windows Vista or in Windows Server 2008
On a client computer that is running Windows Vista or Windows Server 2008, you try to generate a Resultant Set of Policy (RSoP) report by using the gpresult /h GPReport.html command. The central store for Group Policy stores Windows Server 2008 R2-based ADMX files. In this situation, you receive the following error message:
Encountered an error while parsing. Expected one of the following possible element(s), text, decimalTextBox, textBox, checkBox, comboBox, dropdownList, listBox, but found multiTextBox instead. File\\Path\File_Name line Line, column Column Encountered an unknown error while parsing (error = 0x87400001): -2025848831 (0x87400001) File \\Path\File_Name line Line, column Column
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2638957.