Solution : https://service.sap.com/sap/support/notes/522728 (SAP Service marketplace login required)
Key words : 
extremely long runtimes, investment program position, respective investment program, runtime error time_out, runtime error tsv_tnew_page_alloc_failed, displays wbs elements, include wbs elements, attached advance correction, program error, error hf402
Related Notes : 
       
| 529680 | |
| 495726 | Overall plan incrct if WBS elemnt w/ deletn flag in project |