We're going to get that feature fixed for the next release (3.15).  I don't know why it was behaving that way on your machine, but it was done in our code in a somewhat unreliable manner.

I noticed one important setting you mentioned was that you do have "Remove Excess Whitespace on Save."  If you disable that feature, does the problem go away?

I haven't heard from any other users with a similar issue, no.  Not being able to replicate the issue is making debugging your problem pretty tricky.  Is there anything else about your situation that you could share?  Info like:

1. How many tabs are open when the problem occurs?

2. You mention that sometimes it appears "cropped."  Does that correspond to where the file dialog had been?

3. Do you have "Remove Excess Whitespace on Save" enabled?

4. Are you saving to a local disk or a network drive?

5. Are you saving as free-format or fixed-format Fortran?

6. How often are you seeing "Failed to Save File" errors that you've mentioned?

I'm sorry you are having this problem.  It can't be fun trying to deal with it.

We have a new build that might fix the issue, though we still can replicate it.  Can you try the following?

https://download.simplyfortran.com/3.14 … 4.3351.msi

I basically moved the redraw operations that were occurring during the save procedure out of that routine and back into the main user interface loop.  There may still be issues, but I'm hoping it does make matters better.

I appreciate this description.  There were changes to how saving works to automatically change the current editor's mode when a file is saved in case the extension indicates a different mode should be used.  In order to force the change in editor mode to be realized, some calls were added to attempt to force an editor redraw.  My guess is that the culprit lies in that code somewhere.  Hunting down the actual issue, however, is difficult since I can't yet replicate the issue.

Thank you for the additional information.  I still can't seem to replicate the issue.  Is there a chance you could email the project file (I probably don't need any Fortran code) to support@approximatrix.com?  I'm wondering if it's related to:

It could have something to do with the tabs if you're saving open tabs with your project.

Can you tell me what build you have installed?  Just want to make sure I'm testing the correct one.

EDIT: One more question, if multiple tabs are open when this happens, and you switch between tabs, does it remain blank?