This error generally occurs when not enough information has been entered for the command or because an incorrect combination of arguments was used.
For example, if alias /delete sample1 sample2 has been entered for the alias command, this error will appear because alias /delete can only take one alias name, not two. Alias names do not contain spaces, so the Find/Command box and Command window interpret sample1 sample2 as two different alias names.
To correct this error