Why am I getting "Unhandled exception: local variable 'pwd' referenced before assignment"? - mysql-workbench

Question

I'm trying to transfer a schema from my personal machine to RDS via Workbench. I've exported an SQL dump file and am trying to import it into RDS. However, I get the following error:
Unhandled exception: local variable 'pwd' referenced before assignment
Check the log for more details.
The log file has this:
14:05:01 [WRN][wb_admin_export.py:process_db:277]: Task exited with code 1
14:05:01 [ERR][ pymforms]: Unhandled exception in Python code:
Traceback (most recent call last):
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 1334, in _update_progress
r = self.update_progress()
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 913, in update_progress
self.start()
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 1323, in start
password = self.get_mysql_password(self.bad_password_detected)
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 963, in get_mysql_password
if pwd is None:
UnboundLocalError: local variable 'pwd' referenced before assignment
An earlier attempt yielded a little more detail:
14:00:24 [ERR][wb_admin_export.py:process_db:251]: Error from task: ERROR 1045 (28000): Access denied for user 'admin'#'<some_numbers_I_probably_shouldn't_share!>.skybroadband.com' (using password: YES)
14:00:24 [WRN][wb_admin_export.py:process_db:277]: Task exited with code 1
14:00:24 [ERR][ pymforms]: Unhandled exception in Python code:
Traceback (most recent call last):
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 1334, in _update_progress
r = self.update_progress()
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 913, in update_progress
self.start()
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 1323, in start
password = self.get_mysql_password(self.bad_password_detected)
File "C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_export.py", line 963, in get_mysql_password
if pwd is None:
UnboundLocalError: local variable 'pwd' referenced before assignment
14:00:43 [ERR][wb_admin_utils.py:page_activated:329]: Exception activating the page - 'Label' object has no attribute 'remove_from_parent'Error from task: ERROR 1045 (28000): Access denied for user 'admin'#'<some_numbers_I_probably_shouldn't_share!> (using password: YES)
This has confused me somewhat as I'm not using Python to transfer anything - I'm using Workbench. Clearly I have a password issue but what is it exactly and how do I fix it? I'm logged into RDS and can add or remove schemas/tables etc manually so Workbench knows what the correct passwords are...

Answer 1

For me, the error is regarding db privilege:
mysqldump: Got error: 1044: Access denied for user 'myuser'#'%' to database 'mydb' when doing LOCK TABLES
You have to uncheck the lock-tables option from the "Advanced Options" available in the top right of the data exporter in MySQL Workbench.
If you're using command to export then add --lock-tables=FALSE flag.

Answer 2

If you only want to migrate your DB Structure:
Open workbench
select the connection of your local DB
On the left, in the 'navigator' panel choose 'administration'
'Data Export'
select the schema you want to export
on the right side of the window you should find a 'select box'. switch Dump Structure and Data to Dump Data only
In the same way, select Dump Data only when you will import it!
Honestly, I don't know exactly how it solved the error:
'UnboundLocalError: local variable 'pwd' referenced before assignment ',
but just moving the Structure without the data worked for me.

Answer 3

Go to C:\Users\User_Name\AppData\Roaming\MySQL\Workbench\sql_workspaces and delete the workspace of the server where you are getting error, or in easy way, you can delete all folders in sql_workspaces