Approximatrix Forums

Simply Fortran on new Ubuntu release

2026-09-30T09:06:17Z

I recently updated my computer to Ubuntu 26.04. Unfortunately, Simply Fortran is not updated accordingly.

Version 4 installer

2026-09-30T04:28:01Z

Paid and then downloaded V4 for windows to install on a Win10 machine. First try at installation failed with a message that a dll was missing. Ran the installer again and it claimed that the install was complete, giving me a choice to reinstall or launch. I chose launch and nothing happened. Trying to start the program from the Start menu also failed. I uninstalled and then reinstalled, same problem. Only anti-virus running is Windows defender. Never had any trouble with previous versions and V3.41 is running fine. Any ideas/suggestions?

File dialog box with OSx

2026-09-22T17:37:54Z

In fortran for the Mac, when I want to specify an input file,I have to type in the name, which sometimes can be rather long, leading to typos and such. Is there a way for Simply Fortran to open the standard file selection dialog box for selecting the file? Remember: Mac.

Problem Installing v4.0 while keeping v3.41

2026-09-21T19:30:04Z

I tried installing v4.0 without uninstalling v3.41. It initially appeared to work but I could not find any of the files for v4.0. When I tried uninstalling I could only find v3.41. If I reinstall v3.41 will it be possible to have both 3.41 and v4.0 installed without a conflict?

Intermittent Problem Navigating to Definitions

2026-09-20T10:22:34Z

Hi,

Has anyone experienced an issue with navigating to procedure or variable definitions in Simply Fortran?

On my system, hovering over a symbol or using Ctrl + Left Click sometimes works, but sometimes does nothing. The problem seems intermittent, and I haven't been able to identify any clear pattern. For example, it may jump to a variable definition in another module file, but then stop working shortly afterward.

I'm using Simply Fortran 3.14 on Windows 10.

Has anyone seen this before or found a workaround?

Best regards,

Simply Fortran 4.0

2026-09-03T19:23:44Z

Just moments ago, we released Simply Fortran 4.0! We've packed in a lot of changes, improvements, and new features, so we have a new blog post explaining all the changes that are here.

Finally Simply Fortran will support alternate compilers. While we're still shipping GNU Fortran (version 16.1!) on Windows, the development environment can also employ flang or WebFortran with a simple dropdown selection (and the user installing either of them). On Windows, Simply Fortran can also use WSL directly to compile Linux executables or debug them from within the development environment.

On Linux, users will notice a pretty major overhaul of the look-and-feel of the development environment. Simply Fortran should look more at home and interact correctly with modern Linux desktops. And our compiler selection also works on Linux!

Unfortunately, we do not have a macOS release, nor do we plan on one. The blog entry has more on that decision.

Post Motherboard Replacement Compile times Long

2026-08-21T13:04:20Z

HI all,

I recently had to replace my motherboard in my development workstation. Post recovery, I notice that my compile to EXE file creation times are long. Previously, it would only take about 10 seconds to compile my code. Now it is on the order (have not actually timed it) of a minute or more. Any ideas as to what is happening. I hope it is not another Microsoft thing where they tie the OS and other programs to the HW.

Thanks,
Rod

Build an executable able to run out of the SF IDE

2026-07-08T13:40:14Z

Hello every One,
I would like to create a window application (executable file) able to run in any other computer which does not have SF installed.
What libraries, modules or dll I have to link with to build such exe file that can be executed out of my computer?
Thank You for help.
Victor

Can't link openblas or lapack

2026-06-13T05:42:35Z

I can't link to blas or lapack. In fact, I can't even find lapack or blas.

When is the new version coming?

2026-05-17T02:16:08Z

Hi everyone,

It’s been almost a year since Simply Fortran 3.41 dropped on July 23, 2025. Does anyone have news on when the next version might be released?

Thanks!

Simply Fortan AI?

2026-05-01T17:11:01Z

Jeff,
I am just curious if it's possible/feasible to create a tool (Python script) that calls the Anthropic Claude API along side Simply Fortran that's directed to Fortran source/project files, thereby having a Fortran coding assistant alongside but outside of Simply Fortran?

Having Claude alongside Simply Fortran would assistant in (1) identifying bugs, (2) diagnose errors, (3) review code, and drafting new code. If this cannot be done, what about running Claude in a Windows Powershell terminal pointing to the Fortran project alongside Simply Fortran?

Please excuse my lack of complete understanding of how to implement Claude while running SF. I just think it would be useful to have a Claude window pointing to Fortran projects while running Simply Fortran IDE.

Frank

h5fortran or HDF5

2026-03-28T15:23:51Z

A package to read or write data from the HDF5 file format would be very useful.
h5fortran is a streamlined interface that uses the HDF5 library.

Windows 11 and Appgraphics

2026-03-17T01:31:51Z

Hi,

I have had a problem with my visualization code which uses Appgraphics since switching some systems to Windows 11. I lived with this on other systems for a while be since switching my main workstation to Win11 it has become really annoying. Aside from placement of text in the window, when selecting a check box to force the program to plot circles for particle sizes, the execution of the plotting loop grinds to a very slow pace. In addition, my mouse action on the desktop becomes erratic when this happens. I then have to basically shutdown the program for the mouse to behave properly. Now, I have not touched this code in over a year and it is the poster child for spaghetti code so i am not looking forward to a debugging session because I not sure what is going but the mouse action away from window being erratic is some sort of clue.

I have updated my SF to the latest this afternoon and the problem still exists. Is there anything new in Appgraphics calls that might be causing this?

Oh, one more thing, the program works fine in Windows 10, no change in behavior!

Thanks in advance.

Rod

Running plot

2026-03-09T19:05:03Z

I am on a Macintosh. When my program runs it would be very nice to have feedback on how it is doing, or if it has gotten hung up. In the past I have gotten both by having the program make a running plot, that it plotting some basic results on the screen as the program runs. How do I do that in Simply Fortran for the Mac? I only need 5 routines: Open a plotting window, change the pen color, move the pen, draw a line, and close the window.

File dialog box

2026-03-09T18:47:10Z

Many times I want to enter the name of a data file that is quite long. Typing it in is a pain, and the data files all have different names. A standard file dialog box would be nice. I believe it is available for the windows version? But I use a Mac. In a different fortran you got the standard file dialog box just be setting the file name to a null string in the Open statement. It was really nice.

Could you please add this feature to the Mac version?

Unless its available in some way I have not found, in which case: How do i do it?