Hi,
I have two questions here, thank you for the help.

If I would like to get % deviation from the steady state, should I write the model as exp (x), or exp (xx)?
Also, if one of the variable name is tauc, will it be readable if I write exp (tauctauc)? 
If I want to get solution of % deviation from the steady state, should I take log to all the original steady state so the Dynare will evaluate the log variable around the natural log of steady state, as Stephanie SchmittGrohe and Martin Uribe (2004) Matlab code did?
Thank you again for the reply.
Best,
ShuLing