I have an object window. I added new verb look through. When played I get ‘ I can’t see that.
The window is visible and in the room.
I cancelled the verb and re entered it. Same result.
I don’t understand code. What did I do wrong?

Further to above. I created another window deleting the first . This behaved in the same way.
I have used ‘ look through window ‘successfully in other games in the past ?

It sounds as if the issue is somewhere else in your game. I'm happy to take a look if you send a link.

The problem seems to be that the online editor allows verbs to be created with trailing spaces. Unfortunately, once created there doesn't seem to be a way to edit or delete the resulting verb to fix the problem?

It happens if you put the verb in using the spell checker. I forgot to delete the trailing space. Object nouns don’t allow you to do that . It seems verbs do. Once put in they are difficult to get rid of . Unless the player puts in a verb with a space ( highly unlikely) the verb is rejected and shows a Don’t understand message.