inconsistent application variables

I am using multiple subdirectories each with applicaiton.cfc and unique application name. Users are being redirected from one directory to another by using <cflocation>. I am declaring all variables on 

But almost 30% users experience this type of error (variable is different all the time)

Element IAE.PATH.URLROOT is undefined in APPLICATION.

Element IAE.PATH.INCLUDES is undefined in APPLICATION.

even these variables are already defined in variables.cfm.