Hi I hope someone can explain to me why I am getting this error on my multistep form.

I have an autosuggest field which loads suggestions via ajax when user is typing.

In a regular form autosuggest field works fine but in multistep form the server gives me this error:

=====================================================

ERROR [User Warning]: popCurrent called on ReplicatorModelAsController controller, but it wasn't at the top of the stack
IN POST /vendor-registration/VendorRegistrationForm/field/AddressCity/Suggest
Line 454 in C:\wamp\www\ccn\sapphire\core\control\Controller.php

Source
======
445:    }
446:
447:    /**
448:     * Pop this controller off the top of the stack.
449:     */
450:    function popCurrent() {
451:       if($this === self::$controller_stack[0]) {
452:          array_shift(self::$controller_stack);
453:       } else {
* 454:          user_error("popCurrent called on $this->class controller, but it wasn't at the top of the stack",
E_USER_WARNING);
455:       }
456:    }
457:
458:    /**
459:     * Redirct to the given URL.
460:     * It is generally recommended to call Director::redirect() rather than calling this function
directly.

Trace
=====
<ul>user_error(popCurrent called on ReplicatorModelAsController controller, but it wasn't at the top of the stack,512)
line 454 of Controller.php

Controller->popCurrent()
line 76 of ModelAsController.php

ModelAsController->handleRequest(SS_HTTPRequest)
line 282 of Director.php

Director::handleRequest(SS_HTTPRequest,Session)
line 125 of Director.php

Director::direct(/vendor-registration/VendorRegistrationForm/field/AddressCity/Suggest)
line 127 of main.php

</ul>

I hope somebody can give me even just a clue.

Thanks,