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Question: Error, (in property/ObjProperty) testing against an invalid type

Question:Error, (in property/ObjProperty) testing against an invalid type

WiWiMünster 5 Maple
error diff
January 26 2011
0

Hello,

I have got a question. I have an Hamiltonianfunctionand want to differentiate this function to all variables. There is no problem with most of the variables, but one doesn't work. The error above occures, when I use the button "execute the entire worksheet". When I just press Enter, the errror does not occure and the right results are presented. But I am not abel to use the results.

Has anyone an idea how I can solve this problem?

Thanks in advance.


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