Behavior of Creo if files do not exist in batch mode

Hello,

I'm doing some validations of assemly/drawing models in batch mode.

There is a strange behavior of Creo 3:

If some prt or asm file is absent, after the call of GetLeaf(), many asm files are created (asm0001.asm.1, asm0002.asm.1, ...).

wfcWComponentPath_ptr path = ...
try
{
	pfcSolid_ptr solid = path->GetLeaf();
}
xcatchbegin
	xcatchcip (Ex)
	cout << "Exception: " << Ex << endl;
xcatchend

I retrieved the paths from the root product per wfcWAssembly::ListComponentsByAssemblyRule.

Another question is, how can I get the file name, which is absent in the directory? In Creo, I can see it (in red) in the tree on the left side. If a drawing file is opened and its reference part is not in the directory, a message box is shown and says XXX.PRT is not in the directory. How can I get the info (XXX.PRT)?

Thank you!

Xinyu