While pushing more and more Internet Access Points on the emulator, the CommDB database appeared to malfunction.

First of all, when deleted temporary IAP, some others have disappeared too.
Next, when creating new entry, those which were gone can suddenly appear.
In conclusion, after system attempts to retrieve connection data, it returns “General error -19” and “General error -20”

Undoubtedly the reason was in wrong DB’s records manipulation. During debug, some tables could be filled in, while the rest are untouched if the debug is stopped.

While searching for a method to reset the CommDB on emulator I’ve looked through an amount of posts and articles:

symbian-freak.com/...
newlc.com/topic-7653
developer.sonyericsson.com/...
discussion.forum.nokia.com/...
simplysymbian.com/...

One can reset a real phone softly by combination: #*7870#
And hardly (full) by combination: #*7370#
Also one can go to main menu, select settings, general, factory settings.

After all this methods fail to function at win emulator, I was ready (with a heavy heart) to reinstall the SDK.

Mine is S60 3rd FP1 (Symbian 9.2).

But fortunately I’ve remembered that I have a backup copy of “Epoc32” folder stored when migrated from one machine to another. From one of the articles above I’ve learned that someone have installed the SDK to a different folder, then replaced old “Ecpoc32” with the fresh one.

So did I with backup’ed one.

With a sinking heart I was waiting while the emulator is starting again. After that I’ve unexpectedly found out former “cold” blue theme.

That was good. Emulator can start.

All previously installed apps were not there. But CommDB database works fine now and the whole behavior is quite adequate.