Thanks, after changing "kerneloptes" to kernelopts it works correctly. Thank you so much for your help,

Mark

I am having problems in getting this to work.  First I am usin Maple 13 on a mac.  Second Do you mean After "with( DifferentialAlgebra)" in your comment since I am using differential geometry package.  Third I get error label DataToLabel is not a command in the DifferentialGeometry package.  I have attached worksheet below and thanks once again for your efforts,

Mark

Download SpacetimeGeometryCha.mwSpacetimeGeometryCha.mw

Again thanks so much for the help but I still can't get any of this to work - I am inserting a maple worksheet as well as a link to it.

  Mark Weitzman

Download SpacetimeGeometryCha.mwSpacetimeGeometryCha.mw

Thanks for suggestion - I can't seem to get it to work - exactly where am I supposed to insert this command? in the DGsetup( [Ψ,ϴ,ϕ], ThreeSphere, verbose) ; command - before it or after it ?