Hi Enrique,
You can use the below FM:
RS_CHANGE_CREATED_VARIANT - Change the contents of variant
Pass CURR_REPORT = Report Name, CURR_VARIANT = Variant Name, ONLY_CONTENTS = 'X' and fill tables parameter VARI_CONTENTS with the contents to be updated. For example.
| SELNAME | P_MATNR |
| KIND | P |
| SIGN | I |
| OPTION | EQ |
| LOW | 1000 |
HIGH 2000
Regards
Gangadhar