Changing the database in lisp expression

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I'm using sendQueryToPTools in PythonCyc in order to be able to use lisp expressions.

I can get the class of a pathway

pythoncyc.sendQueryToPTools("(get-instance-direct-types '|GLYSYN-PWY|)")

But this is not working for all pathways

pythoncyc.sendQueryToPTools("(get-instance-direct-types '|PWY-6120|)")

PToolsError: An internal error occurred in the running Pathway Tools application: :error Object "PWY-6120" is not coercible to a frame for KB ECOBASE

I assume it is caused by the database (ECOBASE). How can switch to METACYC?

PS.: I tried pythoncyc.select_organism('meta') but it is returning a pdgb object and seems to have no influence on the lisp query.