Wuala error: "Failed to find Java VM" even when Java is installed

Question

I have just installed Wuala, some kind of Dropbox equivalent, and, when I start it, a window appear telling "Failed to find Java VM".

I already have a Java VM installed, but I have checked again, and the Java VM is installed and be launched from the command line.

Answer 1

Wuala requires the following line to be present in the wuala.ini file (on Windows 7 is located here C:\Users\<USERNAME>\AppData\Roaming\Wuala):

vm.location=C:\Program Files (x86)\Java\jre1.6.0\bin\client\jvm.dll

Note the above path is applicable to Windows 7 64-bit, for JRE 6 32-bit. Also note that Wuala does not start when using the server dll of the JRE 7 64-bit.

Answer 2

Latest versions of Wuala also show this message but for different reason. Wuala installer will install 32-bit Java VM if it is not present on the system. Sometime later, the 32-bit Java VM gets uninstalled for some reason, perhaps when some update removes older insecure VM and replaces it with new one, which happens to be 64-bit. Wuala then stops working.

The solution is to install both 32-bit and 64-bit Java VM side by side by downloading offline 32-bit installer from java.com. This is a supported configuration, although it's not the default. Reinstalling Wuala does the job too as it triggers installation of the right Java VM.