Test for length of argc before trying to access and give informative error message, refer to usage.
Test for length of argc before trying to access and give informative error message, refer to usage.

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core