[galaxy-dev] problem with column options

Dear All,

I try to column options for a param linked to a dataset contained in my history. The first column of my dataset contains sample names. I want it propose me all sample names contained in my dataset. It work when the dataset has few columns but it doesn't work when my dataset has a lot of columns.Someone has a solution?

<param name="ysel" type="select" label="enter sample name(s)" multiple="true"> <options from_dataset="Xdata"> <column name="name" index="0"/> <column name="value" index="0"/> </options> </param>

Thank you for help,