Net Express 5.1 appication closing at start

Hi

I have some cobol applications compiled by Net Express 5.1 and runnig in my network. Some notebook/dektops cannot run this apps because it starts, and then close immediately. No message is displayed, nothing. In another device this same app runs. How to identify what is causing this problem ?

Hi Fabio...

What version of Net Express is this?
What OS are you trying to run under?
Is this running under Server for COBOL or under the Net Express development product?

Is this a console application or a GUI one?
How are you starting the application?

You might try starting it from a Net Express command prompt if there is one available as an error message might be displayed there. You could try a standard Windows command prompt, if the Net Express one is not available.

If your version of Net Express is 4.0 or higher then you could run your application with a CTF trace on which might capture the error.
You could also check the Windows Event log for a possible error 

If none of these things help you might try creating a simple hello world console program and seeing if that will run or perhaps display an error.

Net Express 5.1 (Windows 7). The applications are compiled and we copy it to a network share and run in Windows 11 desktops, under "server for Cobol 5.1". 

GUI: Yes. Dialog System. This app starts by a Delphi app launcher using CreateProcess (win api). In some desktop works fine, in another one, no. Windows process shows this cobol app starting, but nothis is displayed and it close.

If you are running from a network share then it might be a licensing issue.
Are you setting the ASLMFNET environment variable to point to the license database on the server? Do the machines where it fails have access to the license share?

Can you try starting the COBOL program from a command prompt without the Delphi front end just to see if it starts or displays an error message?

> If you are running from a network share then it might be a licensing issue.

This app launcher set enviroment variables before call the app. PATH and ASLMFNET are set. 

> Can you try starting the COBOL program from a command prompt

Yes i can. It was done and the app closes too.

I don't know how to identify what is causing this behavior. 

Thanks for try

There are 5 files in ASLMFNET direcory.

apptrack.exe
aslmodf
mfasdb
prodfile
semfile

How can i recreate db license ? is there a way to do it ? - I don't believe in licesing problem, but i must try it.

Can you create a hello world test program and try that?

If others are running from the same network using the same license database then it wouldnt be a problem with the actual licensing.

Do you know how to create a ctf trace file?

I will try. There are no more Cobol developers in company. We don't use Cobol anymore. 

> Do you know how to create a ctf trace file?

I don't know, but i can try. Any clue ?

Thanks !!!

for a ctf trace follow these instructions:

From a net express command prompt or Windows command prompt create a folder, i.e. c:\\ctftraces

Using notepad or another text editor, create a CTF config file called ctf.cfg and place it in c:\\ctftraces.

Set the following environment variable like:

set MFTRACE_CONFIG=c:\\ctftraces\\ctf.cfg

Run your COBOL program from the command prompt without the Delphi front end

This should generate one or more files with the extension .ctb

Please attach these to your post.

ctf.cfg should contain the following:

mftrace.level=debug

mftrace.dest=BINFILE

mftrace.emitter.binfile#location=c:\\ctftraces

mftrace.comp.mf.rts#all=true