Micro and macro structures connected through attachment points cannot be opened after save in CDXML format in micro mode

[Zhirnoff]

Summary Micro and macro structures connected through attachment points cannot be opened after save in CDXML format in micro mode

Steps to Reproduce

1. Open Ketcher.
2. Draw a benzene ring
3. Add an attachment point to the benzene ring via right click menu
4. Switch to Macro mode and connect attachment point to a macro structure
5. Switch to Micro mode
6. Save structure in CDXML format
7. Open saved file

If it is not possible to draw the structure, then you can open the prepared file (you just need to open it in macro mode and then switch to micro mode): ketcher (53).zip

Expected behavior Micro and macro structures connected through attachment points can be opened after save in CDXML format in micro mode

Actual behavior Micro and macro structures connected through attachment points cannot be opened after save in CDXML format in micro mode

Desktop (please complete the following information):

• OS: Windows 11
• Browser Chrome
• Version 124.0.6367.79 (Official Build) (64-bit)

Ketcher version [Version 2.22.0-rc.2] Indigo version [Version 1.21.0-rc.1]

Refers to feature: https://github.com/epam/ketcher/issues/4530

Attached saved files:

ketcherCDXML (1).zip

[AlexeyGirin]

Not fixed.

Source KET for reproducing: Micro and macro structures connected through attachment points cannot be opened after save in CDXML format in micro mode.zip

System throws an error: Convert error! array: invalid index 0 (size=0)

• Indigo Toolkit 1.21.0-rc.2.0-g1eba70228-wasm32-wasm-clang-19.0.0
• Ketcher Version 2.22.0-rc.7 Build at 2024-06-20; 18:42:41
• Chrome Version 126.0.6478.62 (Official Build) (64-bit)
• Windows 10

[AlexeyGirin]

Moved to Ketcher since Indigo part is done