Question: Error, number of indices exceeds rank



I have been trying to create a code to solve a structure by using FEM, but I keep getting an error that stops me from moving on.


Everytime I run my code, Maple gives me the error in the Title of my question:
"Error, number of indices exceeds rank"


Unfortunately I can't find any help in Maplesoft support for such error, and I need immediate help for that.

Can someone help me with that? Should I post my entire code?


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