[Lazarus] UniqueInstance issue

Luiz Americo Pereira Camara luizmed at oi.com.br
Sun Apr 3 01:40:09 CEST 2011

On 2/4/2011 15:18, Giuliano Colla wrote:
> In an application I'm currently developing, meant to run under RHEL5, I
> needed to ensure that no multiple instances were running, so I installed
> the UniqueInstance component:
> http://sourceforge.net/projects/lazarus-ccr/files/Unique%20Instance/Unique%20Instance%200.2/ 

please publish a sample project and a stacktrace

> Under RHEL5, the only usable combination is:
> Lazarus 9.26.2
> FPC 2.2.2
> i386-linux-gtk2
> In this environment, using the TUniqueInstance component leads to this
> situation: the first instance runs properly, the second terminates with
> an EAccess error in Form Create, which isn't very nice.
> If the Component is not enabled at design time, even the first instance
> aborts the same way.
> Is that something to be expected because of version too new/too old,
> wrong fpc version, gtk2 vs gtk, etc.?
> I'd like to understand if the matter is worth further investigation or
> it's simpler to give up.
> BTW UniqueInstanceRaw works perfectly, but I'd prefer a visual component
> on the design form, to make life easier to maintainers, provided this
> can be achieved with a reasonable effort.
> Could someone point me in the right direction?
> Thanks,
> Giuliano
> -- 
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