Macro-processing error 2

Hi, i am a new user of Dynare. After running my mod file(JEEM2015 file) the following error occured

Unrecognized function or variable ‘policy’.

Error in JEEM2015.driver (line 1366)
if policy == 1

Error in dynare (line 310)
evalin(‘base’,[fname ‘.driver’]);

Required files are attached
JEEM2015.mod (1.0 KB)
model.mod (3.4 KB)
parameters.mod (1.5 KB)
variables.mod (279 Bytes)

Thanks in advance for your help