Error with 3DLUT creation for the DCDM target

[janos666]

Describe the bug
3DLUT creation doesn't work (relieably).

To Reproduce
Steps to reproduce the behavior:

1. Go to '3DLUT tab'
2. Select an ICM file in Settings (to make it the source profile) and pick the " DCDM Y'X'Z' " target colorspace
3. Click on 'Create 3DLUT'
4. See error: 'Error - Can't open file DCDM'

Expected behavior
A 3DLUT should be created for the DCDM X'Y'Z' target.

Versions (please complete the following information):

• OS: Windows 11 24H2
• Python Version: 3.11.9
• ArgyllCMS Version: 3.3.0
• DisplayCAL Version: 3.9.14

Additional context
I successfully managed to create a 3DLUT once for the DCDM target by first letting it fail and then renamed the ICC file from " DCDM X'Y'Z'.ICM file to "DCDM.ICM". But I had no luck since then, so I am not sure what exactly happened when I got a 3DLUT out of the process (note that I didn't test the output file at home [this is mainly a projector target for studios/cinema], I was just happy I got around the error somehow...).
Right now I have the same file under both the original and the modified name and it still ldoesn't work.

[VgerTest]

In Windows version all paths with namespaces do not work properly. You may associate this issue to others that reference spaces in paths and close it.

[janos666]

Is there a workaround? Would it work if I replaced ACES.ICM with DCDM.ICM?