IM 4.0.3, Windows XP Pro
I marked the corners of a roof in several pictures, yet they have not become locators. I need these to be locators so that I can model a cube on it. Why am I not able to make these corners become locators?

Hello,
 
This is probably the origin of most of the problems you posted here.
To get a locator you need:
- the cameras calibrated
- 2 markers minimum to create a locator
Note: a marker set in a shot defines a line in 3D space. By setting 2 or more markers in different shots, and by intersecting those lines, a 3d points (locator) can be created.
 
If your cameras are calibrated:
- are you sure they are all calibrated ?
- be carefull you do not create new markers each time you click in the viewport for one feature: use Ctrl+click only for new markers, and simple click to add other instances in the others shots
 
Hope it helps,
 
Stef

To complete my post here the answer of the support team:
 
> On 26 Apr 2005 at 10:36, Pierre Support wrote:
>
> Hello again,
>
> All your issues (except the image name who are not saved) seems to come from
> the fact you do not calibrate your project correctly.
> Perhaps you have a part of the images who are calibrated but not the
entire set of your images.
> If you can't place a cube or reference distance or even corner tool on the
> desired locator, it's probably because the locators still in 2D mode and
> are not  3D re-constructed.
> Please verify if your scene have been well calibrated (check the color of
> the locator, if they still grey they're not calibrated).
>
> Hope this helps,