??? Undefined function or variable 'gpslat1i'.

Error in ==> <a href="error:D:\STRATUS_2011\RHB\Scientific_analysis\programs\flux\AUTOflux_eval_STRATUS_2011.m,94,0">AUTOflux_eval_STRATUS_2011 at 94</a>
    if ~exist('gpslat1i','var') && isempty(gpslat1i)