Why is my field non-existent?

I have a piece of code that keeps returning a 'Reference to non-existant field...' error for a variable that is definitely defined and I am not sure why. Hopefully someone here can help.

The offending line of code reads:

u6=1/(2*results.mean.massflow.dp)*results.unc.dp;

And the error that gets returned reads: Reference to non-existent field 'dp'.

Ordinarily I would take this to mean that I hadn't defined this value or that there was a typo in the name. However the variable is definitely defined and no typos exist, as far as I can tell. This is easily verified by having the code print this value to the screen immediately before it is used:

results.mean.massflow.dp
u6=1/(2*results.mean.massflow.dp)*results.unc.dp;

This gives the following output on the screen:

ans = 6.095382113821141

Reference to non-existent field 'dp'.

Error in MH47MassFlow (line 108)

u6=1/(2*results.mean.massflow.dp)*results.unc.dp;

Answer 1

[Steven Lord]

What about results.unc.dp? I'm betting that doesn't exist.

[Matt Brown]

Haha... now I feel dumb. That variable should have been results.unc.udp. Thanks!