Calling function from another project

i have a realted issue:

I have tried both the methods to call a function from another project. Call goes fine but script execution fails due to object not found error. How would i make use of the NameMapping objects that belong to Project 2.

To make it simple:

' Unit A has a reference for unit B
'Unit A is in Project A
'call is from unit A to --> sub B of unit B

Unit A
'calling sub B from unit A (below statement)
unit B.Sub B

-------------------------------

'Unit B is in a Project B and has its own Namemapping.
Unit B

Sub B
' here obj_B is getting used.
end sub

Here is the issue:
NameMapping for Project A has something like:
Aliases.Process_A.obj_Parent.obj_A

NameMapping for Project B has something like:
Aliases.Process_A.obj_Parent.obj_B

The script tries to find obj_B in the NameMapping for Project A which is what causing it to fail.

How would i make sure that obj_B should be found in NameMapping of Project B?

Please note that if i execute Sub B from project B on its own (without calling it from Proj A) then it passes without any issues.

Please help.

Many thanks.

-vik