APIs for transport mass - single species only?

hi,
I would like to use an IFM to get and set concentrations in a multi-species problem. As far as I can tell though for the APIs relating to transport mass at nodes (eg IfmGetResultsTransportMassValue, IfmSetResultsTransportMassValue) there is no possibility to specify which species. On the other hand IfmGetNumberOfSpecies(), IfmGetSpeciesName, IfmGetMultiSpeciesId and IfmSetMultiSpeciesId do exist. Any ideas?

cheers
ben

Use IfmSetMultiSpeciesId to set the current species ID, the use the other APIs to operate on that species. The use IfmSetMultiSpeciesId to set the next species, operate on that one, set the next one, and so on ....