On Tue, 19 Nov 2019, Sven Schreiber wrote:
 it seems to me that opening/sending a .inp file to gretl on Windows
 fails if no script editor window is already open. This is with an
 October snapshot. Scenario:
 0. Gretl (GUI) is running.
 1. Double-click on an .inp file.
 2. A small window opens asking "start new gretl instance?". I click
"no".
 3. The dialog window closes, then nothing happens.
 (Dragging the file onto the main window works alright.) 
OK, I see what you mean.
This is very fiddly on Windows, which doesn't do POSIX signals. It
seems the message to open a file in a prior gretl instance was being
sent OK, but not received by prior gretl -- probably because it was
somehow being sent to the wrong window.
We now make a more strenuous effort to identify the correct target
window for the message. That's in git and snapshots.
Allin