I want to dele pcs data. I was running session tipcs2260m000 to archiving projects .
and archiving complete ( archiving company has projects data ,and projects status is archived) . but operation company couldn't delete project data .
why?

I refer Document code: U9352B US(User's Guide for ERP LN Archiving) .
1?Creating an Archive Company
2?Archive/Delete Purchase Order/Schedule History
3?Archive/Delete Sales Order/Schedule History
4?Archive/Delete Warehousing..
5?Archive Projects (tppdm7820m000).
6?Archive Projects (tipcs2260m000).

but Projects(pcs) data couldn't delete.

You can use tipcs2270m000 for deletion of project if the project is free, but if the project is archvied there is no option to delete the project from live company, but system will compress the project data while archiving.