Unable to find region from badlogic

[murchie85]

In the code snippet below, it says incompatible types for region where i have marked asterisk, for some reason it only recognises it as java.lang.object.

public TextureRegion getFrame(float dt){
currentState = getState();

    TextureRegion region;
    switch(currentState){
        case JUMPING:
            region = marioJump.getKeyFrame(stateTimer);  ***********
            break;
        case RUNNING:
            region = marioRun.getKeyFrame(stateTimer, true); ***********
            break;
        case FALLING:
        case STANDING:
        default:
            region = marioStand;
            break;
    }

[creative04]

Did you find a solution about this problem?
I wondered too.
Can you share with me if you find it?

[RobCM]

Make sure that the region in use is from "import com.badlogic.gdx.graphics.g2d.TextureRegion;" and not import com.badlogic.gdx.graphics.Texture;
Also the variables are set as:
private Animation marioRun;
private Animation growMario;