This variable is undefined

[AK_9784236]

After increasing array size of t the variables getting undefined. Help me please. Im very new to the MathCAD. Error occurs on MatchCAD15

 

 If n<= 10 then all works fine. But i need it to be 25

[ValeryOchkov]

Attach pls Mathcad-sheet!

[AK_9784236]

I attached two sheets, the one that is working, and the one that is not.

[Werner_E · Accepted solution]

You may consider changing the value of E0 to avoid the division by zero!

[AK_9784236]

Thank you!