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hi,everybody<br><br>"when i try to run a simulation a message appear:<br>forrtl:severe(696):Real zero raisedto negative power<br>image   PC       ROUTINE         LINE       SOURCE<br>DFORRT.DLL        01F74C49  Unknown       Unkown Unkown"<br><br>THANKS IN ADVANCE<br>                                        </body>
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