vt7 dev release - Warning: Missing argument 4 for CRMEntity::get_dependents_list(), called in modules/Vtiger/models/Module.php on line 1500 and defined in data/CRMEntity.php on line 1870

Can't really see why this is happening. On-screen this was caused by clicking on a vtlib related module icon in the Quote module. I was looking to see a related List of my vtlib custom module.

The Warning is right. If you look at line 1500 of Module.php you will see that the call to function does indeed only have three arguments:

$result = $focus->$functionName($recordId, $this->getId(), $relatedModule->getId());

$functionName is, in this instance, get_dependents_list which is (was) the standard function for UIType 10 related things, e.g. 1:n.