Roadrunner must raise RuntimeError for csymbol delay (unsupported MathML symbols)

[matthiaskoenig]

Roadrunner gives incorrect results for SBML models with delays.
E.g. BIOMD0000000024.zip

Despite not supporting delays numerical results are returned. The correct behavior would be to raise a RuntimeError that models with csymbol delay are not supported.

Copasi handles this better and raises errors

ERROR in 'BIOMD0000000024' Error while running the simulation: >EXCEPTION 2021-04-26T00:18:06<
  CTrajectoryMethod (25): Invalid state at time '1.000000'.

Even better would be to support delays ;) See my issue from 5 years ago
#303

[luciansmith]

Fixed with #845: we now throw on load of SBML models with delay.