How do I solve this error?

Output argument "FBAsolution" (and maybe others) not assigned during call to "optimizeCbModel".

Answer 1

[Walter Roberson]

optimizeCbModel is not provided by Mathworks; it appears to be part of the <https://opencobra.github.io/cobratoolbox/docs/cobra/optimizeCbModel.html Cobra Toolbox> When I look at the code, I see that you would get that error if your input parameters were not valid. You would have just received a warning about "invalid problem", but the code fails to assign to the output before it returns saying that it could not proceed.