Android Question Check if Boolean is Null not working

[Nickelgrass]

Hello,
I have a paradox problem. I have a boolean that sometimes is Null.

dim a as boolean
a = CallSub2(somemodule, "somefunction", someparameter)
If a = Null Then
    log("a is null")
Else
    Log("not null")
    If a Then
        log("a is true")
    else
        log("a is false")
    End If
End If

Then I get an error "java.lang.RuntimeException: Cannot parse: null as boolean" if it is not null. If I leave away the check "If a = Null then" then I sometimes get the exception that a is null.
Do I have to use try catch here?
Thanks
Regards

 

[klaus]

What does your routine do?
CallSub2(somemodule, "somefunction", someparameter)
I supect that the return value is not set correctly.

 

[Spavlyuk]

If you want to check for nulls, define a as an object.

Dim A As Object = '...
If A <> Null And A.As(Boolean) Then
'...
End If

 

[Nickelgrass]

Thanks!