checking for multiple instances of a 4gl program.

[edmorris]

When I run any 4gl program thru a Genero desktop client, and then try to run another instance of the same program, I get the following message and my program and client crash:
"The UserInterface has been destroyed: The container 'myprog' already exists."

my question is how does one detect if a program is already running? that way, I could just make the 2nd instance exit gracefully.

or a better question would be, does 4j's know about this bug?

any help would be appreciated! thanks, -Ed Morris

 

[greggory]

I don't know what a Genero Desktop is ?

If you have a database, you can use a special table to log sessions ?

If you can access Unix Shell, you can run a 'ps' command to find out if there is another instance of the same program running ?

Etc...