### To open a model

- Select File - Open menu or press Ctrl + O.
- Specify the file to open.

# Error / Warning messages

When you open a model in CellDesigner, CellDesigner run SBML/CellDesigner file consistency checks.

Check the contents of the error message and fix the model accordingly if necessary.

e.g.

# libSBML Consistency Check

When you open a model in CellDesigner, CellDesigner run SBML consistency check using libSBML.

Check the contents of the error message and fix the model accordingly if necessary.

e.g.

line 7035 [Error(MathML Consistency)] : The MathML formulas in the following elements must yield numeric expressions: 'math' in <kineticLaw>, 'stoichiometryMath' in <speciesReference>, 'math' in <initialAssignment>, 'math' in <assignmentRule>, 'math' in <rateRule>, 'math' in <algebraicRule>, and 'delay' in <event>, and 'math' in <eventAssignment>. (References: L2V2 Sections 4.10, 4.11, 4.12 and 4.13; L2V3 Sections 4.10, 4.11, 4.12 and 4.13; L2V4 Sections 4.10, 4.11, 4.12 and 4.13)

The formula '' in the math element of the KineticLaw does not return a numeric result.s

If you open your model (ex. your_model.xml) in your favorite text editor,
you might see your model written in SBML (XML) format.

Then please navigate to line 7035 in the model, there you will see

<kineticLaw>

...

</kineticLaw>

block around line 7035. Just remove the above block, and then it might solve your problem.

We suggest you to create a backup of your model before doing this fix.