thank you so much Graziano and ali for helping me i put namelist stanza and i found the model is running successfully and i hope to keep helping
mahmoud 
> Date: Wed, 24 Oct 2012 10:20:48 +0200
> From: ggiulian@ictp.it
> To: mgaber_elkarim@hotmail.com
> CC: regcnet@lists.ictp.it; ahsanshah01@gmail.com
> Subject: Re: [RegCNET] FW: Tiedtke convection scheme
>
> On 10/23/2012 07:20 PM, mahmoud elkarim wrote:
> [...]
> > find two conditions only written in namelist elcrit = 0.0011D0 and coeffr = 1.0D0
> > and despite that all of convection schemes are running
> [...]
>
> All the other parameters are using default values in that case. Just put an
> empty namelist stanza would be enough:
>
> &tiedtkeparak
> /
>
> In this way the read does not fail, and you will have all default values to the
> parameters.
>
> G.
>
>
> --
> Graziano Giuliani - Earth System Physics Section
> The Abdus Salam International Centre for Theoretical Physics
> Strada Costiera, 11 - I - 34151 Trieste Italy