Forum OpenACS Q&A: Response to Error: can't read "query" no such variable while....

Oh yes, one more thing to check is that in the ad.ini file (in the parameters directory) you have replaced all references to yourservername to polv.

Change lines like this
[ns/server/yourservername/acs]
to
[ns/server/polv/acs]

I'm not sure what the difference between AOLserver 3.3+ad13 and 3.42 is. Maybe someone else could answer that?