forrtl: error (72): floating overflow

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Yuxiang Ren

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Jul 21, 2026, 8:32:26 AM (2 days ago) Jul 21
to SWAT+ Editor
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1. Primary Issue Location

Component: SWAT+ Editor
Area of impact: run model
2. Software Versions

QGIS Interface: 3.44.12* SWAT+ Editor:3.2.4 * SWAT+ Revision:61.0.2

4. Description of Issue

forrtl: error (72): floating overflow
Image              PC                Routine            Line        Source            
libmmd.dll         00007FFDC06F1F95  __libm_expf_e7            190  expf_ct.c
swatplus-61.0.2-i  00007FF7EBDD2F55  CLI_RHGEN                  60  cli_rhgen.f90
swatplus-61.0.2-i  00007FF7EBDDC9FA  CLIMATE_CONTROL           139  climate_control.f90
swatplus-61.0.2-i  00007FF7EC13A603  TIME_CONTROL              214  time_control.f90
swatplus-61.0.2-i  00007FF7EBFEDBA7  MAIN                      129  main.f90
swatplus-61.0.2-i  00007FF7EC15D6FB  Unknown               Unknown  Unknown
swatplus-61.0.2-i  00007FF7EC165C60  Unknown               Unknown  Unknown
KERNEL32.DLL       00007FFEA9CC259D  Unknown               Unknown  Unknown
ntdll.dll          00007FFEAAA8AFB8  Unknown               Unknown  Unknown

The meteorological dataset covers the period from 2000 to the end of 2024 and contains daily precipitation and daily maximum and minimum temperatures. Some daily records contain missing values coded as -99.

Using the Hargreaves method, the model runs successfully when the simulation period is set to either:

January 2000 to March 2023, or
May 2023 to the end of 2024.

However, the model fails whenever April 2023 is included in the simulation period.

I checked the meteorological data for April 2023 and found no more than three consecutive missing values (-99). Missing values also occur during the earlier period from 2000 to 2022, but they do not cause the model to fail.

What could be causing this error? What should I check or modify so that April 2023 can be included in the simulation?

Nancy B. Sammons

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Jul 21, 2026, 11:13:36 AM (2 days ago) Jul 21
to Yuxiang Ren, SWAT+ Editor

This appears to be a problem when the model is generating the values.  I would need to take a look at your weather generator data.  Please send me the contents of your current txtinout folder. 

 

 

From: swatplu...@googlegroups.com <swatplu...@googlegroups.com> On Behalf Of Yuxiang Ren
Sent: Monday, July 20, 2026 11:28 AM
To: SWAT+ Editor <swatplu...@googlegroups.com>
Subject: [SWAT+ Editor User Group] forrtl: error (72): floating overflow

 

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