Path Planner Application crashes when using sliders

[RoWiz09]

Describe the bug
Path planner occasionally crashes when using the sliders, with the error "PathAccessException: Cannot open file"

To Reproduce
Steps to reproduce the behavior:

1. Go to Constraints and create a new constraint zone
2. Move the end point slider
3. See error

Versions: (please complete the following information):

• OS: Windows 11
• GUI Version: 2026.1.2
• PPLib Version: 2026.1.2
• PPLib Language: Java