Hi Guido,
I tried to reproduce your problem on my test environment, but I haven't found any problems in:
1 pivoting my dataset
2. using pivoted dataset to create a cockpit
3 creating an association between the pivoted and paramteric dataset with another "simple" one, inside the data configuration of a cockpit
4 executing the created cockpit and check associations.
please check your settings and send us some pics or more details.
Regards,
Nunzia