Re: PgAdmin 4 v.30 on WIN10

Hi,

Can you try renaming existing pgAdmin4.db to pgAdmin4.db_OLD which is
located at C:\Users\<YourUsername>\AppData\Roaming\pgAdmin\
And try to start pgAdmin4 again.

--
Regards,
Murtuza Zabuawala
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

On Wed, Jun 6, 2018 at 9:48 PM, Igor Neyman <ineyman(at)perceptron(dot)com> wrote:

> Hello,
>
>
>
> After installing PgAdmin 4 v.30 on Windows 10 when Trying to start it, I’m
> getting “Fatal Error” message box:
>
>
>
> “The application server could not be contacted”.
>
>
>
> Here is the what’s in PgAdmin log file:
>
>
>
> Traceback (most recent call last):
>
> File "D:/Postgres/10/v3/web/pgAdmin4.py", line 70, in <module>
>
> app = create_app()
>
> File "D:\Postgres\10\v3\web\pgadmin\__init__.py", line 315, in
> create_app
>
> db_upgrade(app)
>
> File "D:\Postgres\10\v3\web\pgadmin\setup\db_upgrade.py", line 25, in
> db_upgrade
>
> flask_migrate.upgrade(migration_folder)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\flask_migrate\__init__.py",
> line 259, in upgrade
>
> command.upgrade(config, revision, sql=sql, tag=tag)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\command.py",
> line 254, in upgrade
>
> script.run_env()
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\base.py",
> line 427, in run_env
>
> util.load_python_file(self.dir, 'env.py')
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\util\pyfiles.py",
> line 81, in load_python_file
>
> module = load_module_py(module_id, path)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\util\compat.py",
> line 141, in load_module_py
>
> mod = imp.load_source(module_id, path, fp)
>
> File "D:\Postgres\10\v3\web\pgadmin\setup\..\..\migrations\env.py",
> line 94, in <module>
>
> run_migrations_online()
>
> File "D:\Postgres\10\v3\web\pgadmin\setup\..\..\migrations\env.py",
> line 87, in run_migrations_online
>
> context.run_migrations()
>
> File "<string>", line 8, in run_migrations
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\runtime\environment.py",
> line 836, in run_migrations
>
> self.get_context().run_migrations(**kw)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\runtime\migration.py",
> line 321, in run_migrations
>
> for step in self._migrations_fn(heads, self):
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\command.py",
> line 243, in upgrade
>
> return script._upgrade_revs(revision, rev)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\base.py",
> line 340, in _upgrade_revs
>
> for script in reversed(list(revs))
>
> File "D:/Postgres/10/v3/venv\lib\contextlib.py", line 35, in __exit__
>
> self.gen.throw(type, value, traceback)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\base.py",
> line 176, in _catch_revision_errors
>
> compat.raise_from_cause(util.CommandError(err.args[0]))
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\util\compat.py",
> line 205, in raise_from_cause
>
> reraise(type(exception), exception, tb=exc_tb)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\base.py",
> line 143, in _catch_revision_errors
>
> yield
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\base.py",
> line 336, in _upgrade_revs
>
> revs = list(revs)
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\revision.py",
> line 698, in _iterate_revisions
>
> select_for_downgrade and requested_lowers
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\revision.py",
> line 694, in <genexpr>
>
> rev.revision for rev
>
> File "D:/Postgres/10/v3/venv/Lib/site-packages\alembic\script\revision.py",
> line 631, in _iterate_related_revisions
>
> ", ".join(r.revision for r in overlaps)
>
> alembic.util.exc.CommandError: Requested revision fdc58d9bd449 overlaps
> with other requested revisions 02b9dccdcfcb
>
> Exception KeyError: KeyError(8304,) in <module 'threading' from
> 'D:/Postgres/10/v3/venv\lib\threading.py'> ignored
>
>
>
> Regards,
>
> Igor Neyman
>
>
>
>
>