Cycle mistake - Unitless

[Motixa]

Good day to all forum visitors!

Tried to apply IF statement inside the cycle to change condition variable WHITE, but encountered error - Unitless (Mathcad 15). Rummaged through forum and mathcad literature, could not find anything(

Who can give advice?

Thank you in advance!

[Werner_E · Accepted solution]

When calling "mem" you forgot to add Delta as its last argument:

[ttokoro]

Just add Δ for second mem.