Hi Rehab;

  You should always have at least one series in any pie graph. Here is the code I use in my framework on the GraphCreate event of the DW Control, as follows ...

ii_rc    =        THIS.SetDataStyle ( 'gr_data', 1,1,  ForeGround!,  fn_get_colour_no ( "Slate Blue" ) )
ii_rc    +=    THIS.SetDataStyle ( 'gr_data', 1,2 , ForeGround!,  fn_get_colour_no ( "BurlyWood" ) )
ii_rc    +=    THIS.SetDataStyle ( 'gr_data', 1,3 , ForeGround!,  fn_get_colour_no ( "Coral" ) )
ii_rc    +=    THIS.SetDataStyle ( 'gr_data', 1,4 , ForeGround!,  fn_get_colour_no ( "Orange" ) )
ii_rc    +=    THIS.SetDataStyle ( 'gr_data', 1,5 , ForeGround!,  fn_get_colour_no ( "Sea Green" ) )

This results in ...

                            Note: Above example is in PB 2017's new DOCKABLE Window style.

Mapped by ...

HTH

Regards .. .Chris