Error in DataTable.Select, first row is null

[isel77]

Hi,

I get a null reference exception while accessing the first row returned
by a Select in a DataTable of a DataSet (typed) stored in cache (
datatable.Select( "FieldX=1" ) ). The error occurs sporadically and I
am able to browse and get all the information of all rows except the
first one. Then, after 1 to 10 minutes, disappears without doing
anything to repair the data.
Does anyone have any idea about this error?

Thanks,