formula expression

[sheck]

Hi,

I am trying to use the Formula Express VI and I am unable to calculate the natural log of a number and then multiply it by 1*10^3.  Could someone please look at my VI and see what I am doing wrong.

Thanks so much!

Sherri

[JeanPierre]

The expression (ln(R))E3 is invalid. Try (ln(R))*1E3