External function error input arguments

Hello there,

I have a namefunction.m file

function output = namefunction(arg1, arg2) ...; end
In the .mod file I added before the model bloc

One of the endogenous model variables is based on the external function:

As arg1, arg2 I plugged in 0.9 and 0.1, alternatively I defined parameters with those values.
I get error messages that an INT_NUMBER, PLUS or MINUS was expected as input argument in the external function, wrong is NAME and FLOAT_NUMBER.
Dynare version 4.1.3, ML 7.10.0(R2010a).
Many thanks for helping.

Please update to the latest version of Dynare. If the problem persists, respond to this message and post your mod file and any other files necessary to run it.