Archiving inactive installations

Hi Experts,

Wanted to know if it is possible to archive inactive installations (EANL & EANLH).I have checked Archiving settings, there is Archiving object ISU_EANL exist in AOBJ. But there is no further customizing settings in SPRO (line info structure,Retention period).

When I am executing SARA,write report,for object ISU_EANL. System gives error message and gets exit.

Please advice on best practice followed for removing inactive installation from system.

Thanks In advance.