Product:
Cognos TM1 10.2.2
Windows 2008 R2 Server
TM1 Architect

Problem:
The TI process does not work when added another TI process.

Possible Solution:
You have by mistake used the same name for the subsets that are in use by the different TI processes. Recommendation to use unique subset name for each process and cube.
This can be made by using this naming convention:

sDim = ‘S2.Valuta’;
sName = ‘$.’| GetProcessName();
sSubSet = sName|sDim;

Create above in prolog for each dimension that you need to use in the TI process.

Then in the epilog enter this, for each created subset of that dimension;

sDim = ‘S2.Valuta’;
sName = ‘$.’| GetProcessName();
sSubSet = sName|sDim;
SubSetDestroy (sDim, sSubSet);

This should make the subset only visible when the process is run, and they will only be around if the TI process crash. Then you have to delete the subset and re-run the TI process.