nios2 ide error message

Ressurecting this topic I have the following scenario:

(1) 64 bit - Windows 7 Home Premium;

(2) Quartus 9.1 sp2

Searching for similar topics the recommendation is the same: update Quartus to a newer version. But there are no return from the users telling if this was the fix.

My questions are:

(a) updating Quartus to a newer version is in fact the solution for this problem ("ERROR: SOPC_KIT_NIOS2 - Undefined variable")?

(b) if "yes", which version of Quartus is the appropriate for my platform (64bit-Win7Home)? I ask this because the lattest Quartus version can be optimized for Win8 and can

have some incompatibility with Win7.

Regards