trac-admin initenv: ProgrammingError: argument formats can't be mixed

[h.goebel@…]

When trying to init a new trac-instanc, I get

ProgrammingError: argument formats can't be mixed

> trac-admin ~/trac/myproject initenv
...
Creating and Initializing Project
Failed to create environment. argument formats can't be mixed
Traceback (most recent call last):
  File "/home/XXX/trac/lib/python/trac/scripts/admin.py", line 613, in do_initenv
    options=options)
  File "/home/XXX/trac/lib/python/trac/env.py", line 130, in __init__
    setup_participant.environment_created()
  File "/home/XXX/trac/lib/python/trac/env.py", line 364, in environment_created
    vals)
  File "/home/XXX/trac/lib/python/trac/db/util.py", line 57, in executemany
    return self.cursor.executemany(sql_escape_percent(sql), args)
  File "/home/XXX/trac/lib/python/trac/db/util.py", line 57, in executemany
    return self.cursor.executemany(sql_escape_percent(sql), args)
ProgrammingError: argument formats can't be mixed
Failed to initialize environment. 1
Traceback (most recent call last):
  File "/home/XXX/trac/lib/python/trac/scripts/admin.py", line 617, in do_initenv
    sys.exit(1)
SystemExit: 1

[anonymous]

The problem occured when using psycopg2.

After I replaced it with pyPgSQL, the problem was gone. Thus it seams to be a problem in conjunction with psycopg2.

[Remy Blank]

We would need much more information to be able to debug that (assuming it is still a problem). Please reopen with more information if the problem still occurs.