The track (255) and sector (15) do not match the disk image size.

[ryandesign]

Using AppleCommander 1.9.0 on macOS 12.7.2, I opened a copy of an existing bootable DOS 3.3 disk image that had been created with INIT HELLO, deleted everything on it except the HELLO program, and tried to import a file to it, and I got this error:

An error occurred during import!

Exception was "The track (255) and sector (15) do not match the disk image size.".

This doesn't happen if I import that file to a blank DOS 3.3 disk image freshly created in AppleCommander.

[ryandesign]

And after encountering this error, the Save button in the toolbar has become enabled even though no change has been made to the disk image that requires saving.