Export to SysML v2 Textual Notation giving a 404 error

[MasterArchitect-Alpha-Omega]

When attempting to download to SysML v2 textual notation I am receiving a 404 error. Has anyone experienced this before? I am using SysON in a basic local test setup. Additionally does SysON have a log file for diagnostics?

[AxelRICHARD]

Hello,

Thank you for using SysON.
Do you see something in the server console when the export fails? If so, could you share it here please?
Could it be possible for you to share your zipped project?

Regards,

[MasterArchitect-Alpha-Omega]

Docker Error log when attempting SysON SysMLv2 textual notation export.txt
Here is my error message pulled from Docker log

[AxelRICHARD]

Thank you, I raised an issue #2032.
It seems related with a LiteralString that returns null.

By the way, you use 2025.12.2 version of SysON. For your information, as mentioned in the official documentation here or here, only YEAR.MONTH.0 versions are stable and suitable for production deployments. Other versions, such as intermediate releases, are intended solely for testing purposes.

[AxelRICHARD]

FYI, #2032 has been fixed and will be available in the next release 2026.3.0 of SysON (end of March)