Interestingly enough it (sometimes) actually created the document, sometimes did not, but always gave the error, even when the document was created. The ExtendScript app is set to Photoshop and main, but will not run even a simple one statement script without an error, so something pretty basic must be wrong. It seems clear to me that I am missing something fairly basic.

Ĭannot execute script in target engine 'main'! I opened Photoshop, opened ExtendScript, opened the scripting documentation that came with ExtendScript and created the first single line script in the document - (), and pressed Run. Once I verified that the pieces all worked (ie, ExtendScript was properly installed, I knew where to place the scripts and how to call them) I decided to write something more involved, and that meant that I wanted to run the scripts from ExtendScript rather than create a script, copy it to the scripting location and running it through Photoshop, and that is where I ran into some issues. I wanted to experiment writing some Photoshop scripts so I downloaded ExtendScript, created a couple of very simple scripts, saved them to the script location and verified that they actually ran.

Adobe photoshop 2017 extend script