Hi,
I do not know why it happens.
You can modify 'options.cfg' for setting single process running.
1. Find options.cfg at directory you installed Clem.
2.Open options.cfg.
3. Find 'max_parallelism
4. Set '1' for running single process.
5. Save options.cfg
6. Start clem and try to check clem running single process.
If you get same problem, contact with SPSS tech support in your country.
P.S. check your OS and AMD's optimizer. SPSS may not support the AMD's optimizer running with Clem.
Taka