Helloo

I'm trying to solve this large system (I attach it) for the variable eqn

It's a vector assigned to the variable and I don't know how!

Thanks  a lot!

 FILE:

View 9175_question_.mw on MapleNet or Download 9175_question_.mw
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When I open my file I get this message....What does it mean??? Why it appears?

I don't know if it's clear, but what I want is write a formula  ...And I'd like it to treat it as Text not math (I don't want Maple to execute it, of course appears an error message if so)

How do I set maple to work with this units kN (kilo newtons), MN (mega Newtons 1MN= 10^6 N)??'  I'm Just starting with maple. Thanks for your help!