Android Question Open user declared section?

[Tjitte Dijkstra]

Today I got an unknown error. In a second after pressing F5(run) I see this error:

B4A Version: 8.80
Parsing code. (0.10s)
Building folders structure. (0.01s)
Compiling code. Error
Kan de aangevraagde bewerking niet uitvoeren op een bestand met een open door de gebruiker toegewezen sectie.
The Dutch line means more or less:
Cannot execute the asked job on a file with an open -user defined- section.

WHAT to do?

 

[Erel]

Why aren't you using B4A v9.80? B4A is free now and there is no reason not to use the latest version.

Have you tried to clean the project (Ctrl + P)?

Maybe a file got locked. If not solved try to restart the PC.

 

[Tjitte Dijkstra]

Erel,
Thanks so far. I'll upoad to v9.80
Most obvious the error has been Windows-related.
After more than one (!!) fresh restart, the error disappeard.