Fatal Error F2039 - Could not create output file

[Willi Fuchs 0]

I am using the IDE of Delphi 10.1 under Windows 10.

After several tests with a program under development which seemed to work quite well, I suddenly got an error message F2039 which says: Could not create output file.

There are no other error messages from the compiler, except some irrelevant hints (such as:  variable....never used).

The problem is, the program was started and running correctly a short time before, and since then I did not change anything in the code.

I have no idea where to look for a solution.

 

[Lars Fosdal 1357]

Have you checked if an instance of the output app is still running?
Does the problem persist if you restart the IDE?

 

[Willi Fuchs 0]

I checked, and there is no other instance running.

And the problem persist when I restart the IDE

[Lars Fosdal 1357]

Have you excluded the output folder from AntiVirus software?

 

Also, have a look at https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer

which can reveal what process that is holding the file.

[Jirka52 1]

It happens also with Delphi 11.2 Alezandria. It is  antivirus