Solution to "The filename, directory name, or volume label syntax is incorrect." error in Drush custom PHP path
It is possible to assign a specific PHP version to execute Drush commands for special Drupal site via Drush aliases configuration file. However in Windows, we can get error:
The filename, directory name, or volume label syntax is incorrect.
… if the we follow the Windows syntax path.
This error is printed from C:\composer\vendor\drush\drush\includes\exec.inc