[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TRNSYS-users] Run time error "Invalid float point operation"



Chun Kwon,
An invalid float point error is a generic error generated by Fortran and can be caused by a lot of things (division by zero, log of a negative number). From outside the Fortran compiler, it is not really possible to tell what happened. If you are not using any user-written types, you can contact your distributor for assistance in finding out what went wrong. If you are using a user-written Type, you can get some idea if you turn on TRNSYS's "debugging" mode by changing the value of field 9 in the Simulation Studio control cards (where you change the simulation start and stop times). This will tell you if TRNSYS found a component's output set to the "NaN" (not a number) condition, or if a component wrote to an output outside the range that it reserved for itself. If that doesn't show you anything, then I would suggest running your simulation from within the Compiler so that you can put in breakpoints and walk line by line through the code to find out where it is going wrong. There are some tips on how to do this in the 08-Programmer's Guide manual.
Cheers,
 David


At 20:17 2/8/2008, h8304506@hkusua.hku.hk wrote:
Dear Trnsys users.

When I ran my simulation of a liquid desiccant dehumidifier, the
captioned error occurred.  Does anyone know what is the likely cause
of such error.  Thank you!

Best Regards
LEE, Chun Kwong
PhD student
Department of Mechanical Engineering
University of Hong Kong




_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@engr.wisc.edu
https://www.cae.wisc.edu/mailman/listinfo/trnsys-users

****************************************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley@tess-inc.com
Web Pages:  http://www.tess-inc.com     and      http://www.trnsys.com

"Providing software solutions for today's energy engineering projects"
****************************************************************************************