Question
I have saved a .m21fm file with MIKE Zero Release 2024. When I try to open this in MIKE Zero Release 2023 the MIKE Zero shell crashes or the file cannot be opened with the error message "Application programmer error Invalid pfsNode".
Why does this happen and how can I overcome this?
Answer
With MIKE Zero Release 2024 the setup file for the modelling was 'cleaned up', removing input sections that were no longer used by the model engine. Among these was the [EQUATION] section for the MIKE ECO Lab module.
In MIKE Zero Release 2023 (and earlier) the setup editor expects the [EQUATION] section for the MIKE ECO Lab module to be present. If this section is missing, the GUI will fail reading the setup - this will lead to a crash of MIKE Zero.
Work-around
In order to open a .m21fm file created in MIKE Zero Release 2024 in MIKE Zero Release 2023, you can add the missing section manually in an ascii editor - see Fig. 1.
Fig. 1 - Adding [EQUATION] section to [ECOLAB_MODULE] section using ASCII editor