The issue you're encountering with the SPACE character being trimmed at the end of the name when using a PNG sequence for a sequence attachment is likely due to how Spine handles attachment names and paths. Spine uses the attachment name for the image path if the path is not specified. If there are spaces or other special characters in the name, it can cause issues with image lookup.
To avoid this problem, ensure that your attachment names do not have trailing spaces or special characters. You can rename your attachments to remove any trailing spaces. Here’s a step-by-step approach:
- Check Attachment Names: Ensure that your attachment names do not have trailing spaces. You can do this by renaming the attachments in Spine.
- Use Consistent Naming: Use a consistent naming convention without spaces or special characters. For example, instead of
Layer 1, use Layer_1.
- Verify Image Paths: Make sure the image paths match the attachment names exactly, without any trailing spaces.
If you still encounter issues, you can use the Find and Replace feature in Spine to quickly fix attachment names and paths. Here’s a link to the Find and Replace feature in the Spine User Guide.
Additionally, you can refer to the following GIF for correctly formatting the name in the path field: 
.
If the problem persists, please provide the full name and a screenshot of how you set it in the Sequence properties for further assistance.
