Photoshop CC 2019 COM issues. (Programming)

[Erik_Spellerberg]

A new version of Photoshop and new COM issues. So what has changed and how do I adapt?

I have a program that talks to Photoshop through COM.

When I run my PyQt application I get this error log:

Traceback (most recent call last):

  File "main.py", line 872, in <module>

  File "exporter.pyc", line 45, in __init__

  File "comtypes\client\__init__.pyc", line 227, in CreateObject

  File "comtypes\GUID.pyc", line 78, in from_progid

  File "_ctypes/callproc.c", line 945, in GetResult

WindowsError: [Error -2147221005] Invalid class string

The same error but when I run the program's source code through a python interpreter:

Traceback (most recent call last):

  File "C:/Projects/tools/TextureTools/PhotoshopExporter/source/main.py", line 872, in <module>

    ps = PhotoshopInterface(EC)

  File "C:\Projects\tools\TextureTools\PhotoshopExporter\source\exporter.py", line 45, in __init__

    self.psApp = comtypes.client.CreateObject('Photoshop.Application', dynamic=True)

  File "C:\Anaconda\lib\site-packages\comtypes\client\__init__.py", line 227, in CreateObject

    clsid = comtypes.GUID.from_progid(progid)

  File "C:\Anaconda\lib\site-packages\comtypes\GUID.py", line 78, in from_progid

    _CLSIDFromProgID(unicode(progid), byref(inst))

  File "_ctypes/callproc.c", line 945, in GetResult

WindowsError: [Error -2147221005] Invalid class string

Any help understanding this would be greatly appreciated!

[Guest]

Hi

This may be one for the Photoshop Scripting forum

I can move the thread for you if you like

[Erik_Spellerberg · Accepted solution]

Yes please!

I have found the issue. In previous versions I could connect to "Photoshop.Application" but now I have to be super specific about the application version.

self.psApp = comtypes.client.CreateObject('Photoshop.Application.130', dynamic=True)

Really wish that wasn't the case because now I have to update this part of the code with new versions or write code to detect which one is installed on my system.

[Jarda Bereza]

What if you would uninstall PS2018?

[Erik_Spellerberg]

We did but it did not help. I did choose "keep preferences" maybe that left something in the registry?

[Tom Ruark]

Always do the install as the last. I would uninstall 2019 and install again.