forrtl: error (72): floating overflow
江浩弘
Dear SWAT+ Development Team and Forum Members,
I am encountering a runtime error when running SWAT+ GW FLOW (rev61.0.1, 64-bit debug version) and would like to ask for your assistance.
forrtl: error (72): floating overflow
Image PC Routine Line Source
rev61.0.1_64debug 00007FF62CBD2755 SD_CHANNEL_CONTRO 262 sd_channel_control.f90
rev61.0.1_64debug 00007FF62C8EFFC6 COMMAND 355 command.f90
rev61.0.1_64debug 00007FF62CBA772A TIME_CONTROL 255 time_control.f90
rev61.0.1_64debug 00007FF62DF1AF1A MAIN__ 134 main.f90
rev61.0.1_64debug 00007FF62E6BB0EB Unknown Unknown Unknown
rev61.0.1_64debug 00007FF62E6BB819 Unknown Unknown Unknown
rev61.0.1_64debug 00007FF62E6BB732 Unknown Unknown Unknown
rev61.0.1_64debug 00007FF62E6BB5EE Unknown Unknown Unknown
rev61.0.1_64debug 00007FF62E6BB88E Unknown Unknown Unknown
KERNEL32.DLL 00007FF91105E8D7 Unknown Unknown Unknown
ntdll.dll 00007FF912BAC53C Unknown Unknown Unknown
This error occurs during the simulation after initialization, when the model starts routing processes related to channels. Based on my understanding, the floating overflow may be caused by one or more of the following issues:
Extremely large or zero values in channel-related parameters (e.g., channel width, depth, slope, roughness, or hydraulic variables),
Invalid or inconsistent channel geometry,
Numerical instability caused by very small denominators or excessively large intermediate values in the channel flow calculations.
To facilitate debugging and allow you to reproduce the issue, I have attached a compressed ZIP file OF MY txtlnout
If there are specific variables, parameters, or input tables that are commonly associated with floating overflow errors in SD_CHANNEL_CONTROL, I would greatly appreciate your guidance on where to check first.
Thank you very much for your time and support.
Any suggestions or diagnostic advice would be highly appreciated.
Best regards,
Nancy B. Sammons
Thank you for the email and including the txtinout. I will download your file land try and debug it. I will get back to you as soon as possible.
Nancy
From: swat...@googlegroups.com <swat...@googlegroups.com>
On Behalf Of 江浩弘
Sent: Friday, January 16, 2026 5:18 AM
To: SWAT+ <swat...@googlegroups.com>
Subject: [SWAT+ User Group] forrtl: error (72): floating overflow
|
You don't often get email from derekch...@gmail.com. Learn why this is important |
--
You received this message because you are subscribed to the Google Groups "SWAT+" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
swatplus+u...@googlegroups.com.
To view this discussion visit
https://groups.google.com/d/msgid/swatplus/6104eec1-a51c-4faf-8f8a-93967cdd4239n%40googlegroups.com.