Resolution:
Modify the code to correct the type and namespace references as required; then recompile.
Example:
The following example shows an internal type, Package 2.B, referenced by a type in a different namespace:
class-id package1.A.
method-id main static.
invoke type package2.B::Meth1
end method.
end class.
class-id package2.B internal.
method-id Meth1 static.
end method.
end class.