error message "result is not scalar"...

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Author Message   Thiansiri Luangwilai (paeza) New member Username: paeza Post Number: 2 Registered: 07-2009 Posted on Tuesday, February 09, 2010 - 02:43 pm:    Hi I am trying to model the groundwater moving but i always get the error message "result is not scalar". I have no idea where i have to fix it. Please help. Thank you so much water_time.pde (1.9 k)   Thiansiri Luangwilai (paeza) Junior Member Username: paeza Post Number: 3 Registered: 07-2009 Posted on Tuesday, February 09, 2010 - 04:32 pm:    Hi I have fixed that error however i got a new error and cant find the way for this error. Everytime i run the script, there will be error message "step failed, retry". I am using student version 5 water_time_last.pde (2.6 k)   Marek Nelson (mgnelson) Moderator Username: mgnelson Post Number: 183 Registered: 07-2007 Posted on Tuesday, February 09, 2010 - 06:40 pm:    You likely have a temporal discontinuity in your equations or the initial conditions. Recheck all your equations to ensure they make physical sense. In particular, I notice you have DT(V) in the P equation. If I remove it, the system starts to solve. Also RHOF contains a term (T-T0) when I think you mean (TEMP-T0).   paeza Member Username: paeza Post Number: 4 Registered: 07-2009 Posted on Thursday, March 11, 2010 - 05:46 pm:    Thank you so much