drush sql-sync: “The external command could not be executed due to an application error.”

[0711master]

When I execute drush sql-sync to get a database from the server to local, I get the following error after login with ssh:

The external command could not be executed due to an application error.

Here is the debug after the ssh login:

Backend invoke: php
C:/Users/x/drupal-root/vendor/drush/drush/drush.php --backend=2 --verbose --debug --uri=localhost --root=/C/Users/x/drupal-root/web sql-conf --all 2>&1
php C:/Users/x/drupa-root/vendor/drush/drush/drush.php --backend=2 --verbose --debug --uri=localhost --root=/C/Users/x/drupal-root/web sql-conf --all 2>&1
The external command could not be executed due to an application error.
Error: no database record could be found for target @Local
Returned from hook drush_sqlsync_sql_sync_validate
Command dispatch complete

Does anyone have an idea? I'm at my wits' end.

[weitzman]

Please use Drupal Answers for support questions.