Cannot call Class with package name in PL file

I have create a PL for example : vhpFO1ui.pl with PROLIB syntax and add (arl_listUI.r) into it. PROPATH in .ini are set to the PL file directory path.

There are 2 cases :

1. 
   a program called arl_listUI.r in PL it returns an error. (source with package name).
   
   
2. 
   I have tried to remove package name in source file (.cls), compile and add it into PL. When a program called it, it's just crash. No .exe left in task manager either. (without package name).
   

P.S. : It works well if the programs (.r) are placed in directory (with package name). There are thousands of programs, it would be better if it works with PL (for long-term update on client side).

Any suggestion?

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