Annihilation example does not run

[briandrawert]

update, a fix to urdme_compile(), now the error is this:

??? Reference to non-existent field 'comsol'.

Error in ==> urdme2comsol at 102 xmesh = meshextend(umod.comsol);

Error in ==> urdme at 299 umod = urdme2comsol(umod,data.U,umod.tspan,opts.verbose);

Error in ==> annihilation_run at 9 umod = urdme(umod,@annihilation);

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annihilation_run Compiling solver... using: /Users/brian/Desktop/research/urdme-github//build/Makefile.nsm ??? Reference to non-existent field 'urdme'.

Error in ==> urdme_compile at 134 elseif(isfield(fem.urdme,'M1')) % inline propensities specified

Error in ==> urdme at 256 umod = urdme_compile(umod,model_name,opts.propensities,opts.solver,opts.verbose);

Error in ==> annihilation_run at 9 umod = urdme(umod,@annihilation);