Invalid Array Index in For Loop

[RandyA.EI]

Hello,

I am trying to program the following with some tweaks to fit my problem.

I am pretty new to MathCad Prime and I am running into some problems with verifying my array index in step 2.1.

Please help!

Thanks!

[LucMeekes · Accepted solution]

See if this helps:

Success!
Luc

[RandyA.EI]

Thank you!