[FLASH-USERS] New Install, f951: Fatal Error: Reading module ‘iso_c_binding.mod’

[David Montgomery]

Leland,

Thanks, commenting out those lines in the Makefile.h file worked, was able to run the Sedov problem single processor and parallel!!

Will try your steps 13-15 using Hypre on the Zpinch problem after I get the chance to look at the Sedov data.

David

> On Jun 5, 2025, at 11:03 PM, Leland Ellison <lee at pacificfusion.com> wrote:
> 
> Welcome to FLASH, David.
> 
> Here's a help thread with a solution to the iso_c_binding issue by commenting out a few lines of your Makefile:
> https://flash.rochester.edu/pipermail/flash-users/2024-May/008664.html <https://flash.rochester.edu/pipermail/flash-users/2024-May/008664.html>
> 
> And a handy new user tip that you can Google search the mailing list with a search query like this:
> site:https://flash.rochester.edu/pipermail/flash-users <https://flash.rochester.edu/pipermail/flash-users> iso_c_binding
> 
> Hope this gets you up and running!
> 
> Leland
> 
> ________________
> Leland Ellison PhD
> Pacific Fusion
> Lead - Modeling and Simulations
> 
> On Thu, Jun 5, 2025 at 9:55 PM David Montgomery <dsmont80 at gmail.com <mailto:dsmont80 at gmail.com>> wrote:
> All,
> 
> I’m a FLASH newbie, and just installed FLASH4.8 on a laptop running MacOS 12.7.6, following Leland Ellison’s post "Installing FLASH on macOS from scratch” posted 06/13/2023.
> 
> Everything seemed to install successfully, and I edited the Makefile.h as noted in his step 7.
> 
> My Makefile.h is attached
> 
> And I updated all the *.py setup scripts in FLASH4.8/bin to "/usr/bin/env python3” as noted in Step 8.
> 
> I then tried his step 9:
> 
> cd FLASH4.8
> ./setup -auto Sedov
> 
> Changing his typo from -audo to -auto
> 
> When I got the following error:
> 
> make
> rm -f reorder.sh
> /opt/homebrew/bin//mpif90 -ggdb -c -O2 -fdefault-real-8 -fdefault-double-8 -Wuninitialized -fallow-argument-mismatch  -DMAXBLOCKS=1000 -DNXB=8 -DNYB=8 -DNZB=1 -DN_DIM=2 Cpp_interface.F90
> f951: Fatal Error: Reading module ‘iso_c_binding.mod’ at line 1 column 1: Unexpected EOF
> compilation terminated.
> make: *** [Cpp_interface.o] Error 1
> 
> I searched the Users posts, and found a previous post stating to include "-fallow-argument-mismatch” in FFLAGS_OPT, FFLAGS_DEBUG, and FFLAGS_TEST.
> 
> But per Leland’s Mac install instructions that has already been done.
> 
> See my attached Makefile.h
> 
> Any help please?
> 
> David Montgomery
> LANL Guest Scientist
> LANL (retired)
> 
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