Need advice: Applicationn created on one W10 does not work on others
lazarus / 34-Windows

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hansotten · 2019-07-26 09:19

Strange problem, need advice where to look.

Two Windows 10 PC, 64 bit. latest updates (1903) applied

Lazarus 2.20, FPC 3.0.4 SVN rev 60954

Default installation on C; \lazarus

If I create an app (New Application) on PC 1 (which has 3 monitors
attached) and build just this empy application, it runs fine on this
PC 1.
Copied to the other PC 2 (one monitor, though I attached a second for
test) starting the app result in the standard lazarus Icon in the
tray, but no window.
Copied to PC 3 (Same OS etc) same empty not running app.

When I create the also empty) app on the other PC, compile it there,
it runs on both PC's.

When I compile the source create on PC 2 on PC 1 it also runs on both
PC's.

So something is different in the app when created on PC 1, but I
cannot find it.  The C:\lazarus directory is identical, same install
with the cleanup of older configurations.

The files created  like lfm lpi pas are identical (I did a file
compare).

So what is preventing the app originally created on PC 1 running on
both PC's?

This problem started with an application that now is quite big,
several forms, etc, Developed on PC 1 but not running on PC 2.
With the experiment above I tried to find the cause.


Any advice?

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tudi_x · 2019-07-26 09:37

switch to Linux and provision the machines with Ansible (easiest).
the situation you are in is typical problem that was a trigger of
DevOps.

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Peter H · 2019-07-26 10:57

Possible the window is open, but ouside screen coordinates.

In Taskbar, near to the "Cortana" icon, there is an Icon "Show active
Apps".
(My desktop is not english, I dont know the name i english)
This should show all windows smaller tiled on the destop.

Try this. If you see the window, right-click it.

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hansotten · 2019-07-26 11:09

Problem solved.

Indeed there was a problem with the windows off screen, not able to
create even I think.

The left properties of the forms were out of reach of a single monitor
system.
Move the forms to the main monitor on my 3 monitor system and the
application shows fine on the other P's and all is well.

Peter, thanks for the hint, it pointed me to the solution!

Hans

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lucamar · 2019-07-26 18:59

A more generic solution is probably setting the forms' DefaultMonitor
and/or Position properties to some proper values for your setup.

Or check the forms' bounds in their OnActivate or OnFirstShow* events
an adjust accordingly.


* There is no field or property to set "OnFirstShow"; you have to do
it in the OnCreate handler by using AddHandlerFirstShow