The integration of Marvin services clients into JChem For Excel is currently incomplete. As local services can't be accessed in non-Java environments, they don't work in JChem For Excel. However. web services do work. To call a service function via Chemical Terms, use the JCChemicalTerms Excel function.
In this example, we want to calculate the number of N atoms in the SMILES string of the molecule. We use the JCChemicalTerms(A2, CountAtomsPHP(molString('smiles'), 'N')). The result of the calculation is put into a new cell. The content of the cell will be automatically updated if the values of the input cells are modified.