Hi,
Nothing in the log ?
I use the following to open xls file. 
The full path  (C:\Users\...............\filname.xls) is in my names variable as my script was to open and concatenate several excel files. 
The code below will open the 1st table only.
dt1st = open(names[1],
                        Worksheets( "Data" ),  // do not change as it is an excel worksheet name
                        Use for all sheets( 1 ),
                        Concatenate Worksheets( 0 ),
                        Create Concatenation Column( 0 ),
                        Worksheet Settings(
                                            1,
                                            Has Column Headers( 1 ),
                                            Number of Rows in Headers( 1 ),
                                            Headers Start on Row( 1 ),
                                            Data Starts on Row( 2 ),
                                            Data Starts on Column( 1 ),
                                            Data Ends on Row( 0 ),
                                            Data Ends on Column( 0 ),
                                            Replicated Spanned Rows( 1 ),
                                            Suppress Hidden Rows( 1 ),
                                            Suppress Hidden Columns( 1 ),
                                            Treat as Hierarchy( 0 )
                                        )
            );
f2S=concat(path,dataset_name,".jmp"); // nom fichier
dt1st << save(f2S);  // save summary global