Jorge, regarding access to /data/local/tmp. Some time ago when I was making Android port this was close to recommended place for tmp files on android. See for example https://stackoverflow.com/questions/21105281/where-is-the-tmp-in-android https://stackoverflow.com/questions/21105281/where-is-the-tmp-in-android
Surpise but currently I also can't access that directory any more, even on physically same device which was used for tests that time. I.e. appears to be SW upgrade result. The problem is where should we place tmp files (including lock files and other shared files) now. Application cache may be at any moment cleaned which will cause problems if fb engine is running. Do you have better ideas than /storage/emulated/legacy/firebird ?
