DB2 migration v8.1 to v9.5 in SAP 6.40

Hello Sirs,

I'm planning the migration of the databases of v8.1 to v9.5 in SAP 6.40.

I have a few questions regarding this issue... if anyone knows please tell me.

1. Is there any inconvenience of having DEV system under DB2 9.5 and the other systems Productive and Quality with DB2 8.1?

2. Does anyone found any tricky problem in this database migration 8.1 -> 9.5?

thanks.

regards,

Filipe Vasconcelos