m GMS User Posted November 17, 2009 Report Share Posted November 17, 2009 Hello everyone,I am building a transient MODFLOW model with GMS 7.0 using the conceptual model approach. There is a huge problem with the number of stress periods I want to run :- Until I've less than 1001 stress periods, MODFLOW runs, everything is ok- If I have more than 1000 stress periods, MODFLOW aborts immediatly (I mean it is not a problem of convergence)Hereunder the error message :"Excutable started.....This file is not a GMS MF2K superfile. Assuming NAM file......ALLOCATION OF ARRAYS X, Z, IX AND XHS FAILEDRETURNED ERROR MESSAGE NUMBER : 41MODFLOW 2000 finished"I have made many many tests with my files and I have also tested it with entering the data manually directly in the Stress Priod box in Global Options.Moreover, I don't understand because the option of output control "Enable saving of computed flows for all source sink object" is already unchecked... Thanks in advance for any help ! Quote Link to comment Share on other sites More sharing options...
Alan Lemon Posted November 19, 2009 Report Share Posted November 19, 2009 By default the maximum number of stress periods in MODFLOW is 1000. The version of MODFLOW distributed with GMS has this same limitation. Quote Link to comment Share on other sites More sharing options...
m GMS User Posted November 24, 2009 Author Report Share Posted November 24, 2009 Ok thanks Alan,I seen you posted a version of modflow with the max number of SP=10 000 but now the link is not available.How can I get this ? because I Need use more than 1000 SP ...Thanks in advance ! Quote Link to comment Share on other sites More sharing options...
Alan Lemon Posted December 8, 2009 Report Share Posted December 8, 2009 Sorry for the slow response. Here is a version that is compiled for 10000 stress periods.ftp://pubftp.aquaveo.com/download/temp/mf2k_h5.zip 1 Quote Link to comment Share on other sites More sharing options...
IKA Posted September 30, 2011 Report Share Posted September 30, 2011 Hi I also have this problem as I wish to run with 3652 stress period. How can I get hold of this addition of GMS, the link does not seem to work. ThankIda Quote Link to comment Share on other sites More sharing options...
Alan Lemon Posted October 6, 2011 Report Share Posted October 6, 2011 Have you tried the version of MODFLOW that is distributed with GMS 8.1? I think I changed the one that we distribute so that it will handle 10000 stress periods. Quote Link to comment Share on other sites More sharing options...
Groundwater Modeler Posted September 22, 2020 Report Share Posted September 22, 2020 Hello all, I realize it is been a number of years since this thread was last active, but I am running into a similar issue in SEAWAT V4. I need ~35,000 stress periods and it appears the max number of stress periods in SEAWAT is 10,000. I'm receiving the error below. Does anyone know where I can increase the number of allowable stress periods in the SEAWAT source code so that it can be recompiled to accept a larger number of stress periods? I'm modeling tides, so many stress periods are needed to resolve the tidal signal over a year. **** STRESS PERIOD(S) IN SIMULATION THE MAXIMUM NUMBER OF STRESS PERIODS IS:10000 Thank you. Quote Link to comment Share on other sites More sharing options...
Michal Posted September 23, 2020 Report Share Posted September 23, 2020 Hello, There is a parameter in the swt_v4.f on line 200 called MXPER. It should be just a matter of changing its value to lets say 100 000 and compiling. Quote Link to comment Share on other sites More sharing options...
Groundwater Modeler Posted September 23, 2020 Report Share Posted September 23, 2020 (edited) Thanks very much, Michal! Edited September 23, 2020 by Groundwater Modeler Quote Link to comment Share on other sites More sharing options...
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