Ok found a solution that work for me with SIM 7.5
On the SIM server...
1- Stop "HP Version Control Repository Manager" service
2- Delete C:\Repository
3- Copy the new HP Service Pack "843216_001_spp_2015.10.0-SPP2015100.2015_0921.6.iso" to C:\Repository
4- Start "HP Version Control Repository Manager" service (It may takes a few hours to the service to extract the .iso)
Just monitor the "C:\Repository "it will be about 2608 extracted files unpon completion
Wait for extract completion before proceeding with #5
5- Upgrade and/or install VCA 7.3.5 (June 2015) cp026226.exe on all of your servers
6- Within SIM reassign the baseline to each of your server by clicking on the ? under the SW column
7- To save space, you can delete the .iso file in C:\Repository
8- End of the procedure
Good luck at this work for me and it is now stable :)