Can't figure out why it displays undefined function or variable while the variable is defined earlier.

Help,

I'm getting this error Undefined function or variable 'globalStart'. This function is defined earlier in the script.

%%Set testing period parameters
% global start/end date for WFA
globalStart = {'2010/02/01'}; 
globalEnd = {'2016/9/30'}; 
% Find unique trading days for all trading days combined
TDay = getTDay(globalStart,globalEnd);

I can't figure out why.

[Guillaume]

Surely, this can't be the exact code that you use. What is the actual code?

[Jan]

@liu: The problem is concealed in the lines, you do not show us. Currently we see only the lines, which show the intention, but obviously something went wrong anywhere else.

[liu James]

Thanks. You are right, I figured out that there was an extra clear and clc written in another function that wiped out the variable.