# Undefined command/function '\_fff'

**URL:** <https://forum.dynare.org/t/undefined-command-function--fff/189>\
**Category:** Dynare help (legacy posts)\
**Created:** [16 October 2006 05:42 UTC](https://forum.dynare.org/t/undefined-command-function--fff/189 "2006-10-16T05:42:02Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tandynare](https://forum.dynare.org/letter_avatar_proxy/v4/letter/t/a4c791/32.png) [@tandynare](https://forum.dynare.org/u/tandynare)\
**Post date:** [16 October 2006 05:42 UTC](https://forum.dynare.org/t/undefined-command-function--fff/189/1 "2006-10-16T05:42:02Z")

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??? Error using ==\> feval  
Undefined command/function ‘\_fff’.

Error in ==\> fsolve at 180  
fuser = feval(funfcn{3},x,varargin{:});  
When I ran a program, the computer came back with the following error message,

Error in ==\> dynare\_solve at 15  
[x,fval,exitval,output] = fsolve(func,x,options,varargin{:});

Error in ==\> steady\_ at 23  
[ys\_,check] = dynare\_solve([fname\_ ‘\_fff’],x);

Error in ==\> steady at 7  
steady\_;

Error in ==\> test at 95  
steady(1);

Error in ==\> dynare at 26  
evalin(‘base’,fname) ;

Please help!

---

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**Author:** ![MichelJuillard](https://forum.dynare.org/user_avatar/forum.dynare.org/micheljuillard/32/5318_2.png) [@MichelJuillard](https://forum.dynare.org/u/MichelJuillard)\
**Post date:** [16 October 2006 06:41 UTC](https://forum.dynare.org/t/undefined-command-function--fff/189/2 "2006-10-16T06:41:39Z")

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If your model is written in file mod1.mod, you must type

dynare mod1

According to the error message that you got, for some reason, Dynare doesn’t know the name of the file (mod1, in my example)

Best

Michel