Hi Enrique,
Are you able to see the output of tcode ME2L when executed with 'Scope of List = ALV' and
'Plant = 3885'. Please run ME2L with this input and check.
I guess there are 'No suitable Purchasing Documents' for this selection criteria.
Try with below code aswell
data : rspar_tab TYPE TABLE OF rsparams,
rspar_line LIKE LINE OF rspar_tab.
rspar_line-selname = 'LISTU'.
rspar_line-kind = 'S'.
rspar_line-sign = 'I'.
rspar_line-option = 'EQ'.
rspar_line-low = 'ALV'.
APPEND rspar_line TO rspar_tab.
clear rspar_line
rspar_line-selname = 'S_WERKS'.
rspar_line-kind = 'S'.
rspar_line-sign = 'I'.
rspar_line-option = 'EQ'.
rspar_line-low = '3385'.
APPEND rspar_line TO rspar_tab.
SUBMIT report1 USING SELECTION-SCREEN '1000'
WITH SELECTION-TABLE rspar_tab EXPORTING LIST TO MEMORY AND RETURN.
Thanks