Hey everyone!

This is my custom form:

class PatientFormMC01 extends Form {
     function __construct($controller, $name) {
        $fields = new FieldSet(
            new TextField("Field1", "Field 1"),
            new TextField("Field2", "Field 2")
        );
        $actions = new FieldSet(
            new FormAction("doForm", "Submit")
        );
        $validator = new RequiredFields(
            "Field1", "Field2"
        );
        parent::__construct($controller, $name, $fields, $actions, $validator);
    }
    
    function doForm($data, $form) {
        //
        Director::redirectBack();
    }    
}

And I call it using:

function Form(){.....
return new PatientFormMC01($this, "Form");
.....
}

But I am getting:
Fatal error: Call to a member function loadDataFrom() on a non-object in ...sapphire/core/control/Controller.php on line 178

Using SS 2.2.3

I don't know how this crazy part of SilverStripe works!! It was quite funny (although frustrating) finding a solution to the problem.

SilverStripe seemed to want to find a 'return new CustomForm(...' in my Page_Controller's Form() function.
This didn't work as the urlParam["Action"] which returned the wanted form, was lost in the process of submitting the form.

I stumbled after a few million stumbles onto a working (but possibly dodgy) fix:

The explained background to my problem in Form()

$action = (int)$this->urlParams['Action'];
switch($action) {
        case "1":
          return new CustomFormMC01($this, "CustomFormMC01");
          break;

And an extra function in my Page_Controller does the trick.

function CustomFormMC01() {
      return new CustomFormMC01($this, "CustomFormMC01");
    }

Hope this helps!!!!!

Page_Controller of a special page?