Hi, Looking at the example on the Tool Config Syntax wiki page: Example Assume that the tool includes an input parameter named "database" which is a select list ( e.g., assume the following inputs ): Toggle line numbers<http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#> 1 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-4197fe3d76b4282c0f9aa2576fbdec6550c3174f_1> <inputs> 2 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-4197fe3d76b4282c0f9aa2576fbdec6550c3174f_2> <param format="tabular" name="input" type="data" label="Input stuff"/> 3 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-4197fe3d76b4282c0f9aa2576fbdec6550c3174f_3> <param type="select" name="database" label="Database"> 4 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-4197fe3d76b4282c0f9aa2576fbdec6550c3174f_4> <option value="alignseq.loc">*Human (hg18)*</option> 5 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-4197fe3d76b4282c0f9aa2576fbdec6550c3174f_5> <option value="faseq.loc">Fly (dm3)</option> 6 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-4197fe3d76b4282c0f9aa2576fbdec6550c3174f_6> </param> 7 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-4197fe3d76b4282c0f9aa2576fbdec6550c3174f_7> </inputs> Assume that the user selects the first option in the $database select list. Then the following will ensure that the tool produces a tabular data set whose associated history item has the label "Blat on *Human (hg18)*". Toggle line numbers<http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#> 1 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-c1ccb05e35e84df1d17f7b92455ff66b9d18618b_1> <outputs> 2 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-c1ccb05e35e84df1d17f7b92455ff66b9d18618b_2> <data format="input" name="output" label="Blat on ${database.value_label}" /> 3 <http://wiki.g2.bx.psu.edu/Admin/Tools/Tool%20Config%20Syntax#CA-c1ccb05e35e84df1d17f7b92455ff66b9d18618b_3> </outputs> It shows that .value_label attribute should produce the string in between the <option> tags, not the actual value. Why does this not work? When I use it it produces the value, or am I doing something wrong? regards, Leandro