Real-Time Measurement and Control

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Factory Pattern on a VI running on RT target

Hi everyone,
I have a myRIO that i try to use to implement a factory pattern of OOP.
I have to classes that i need to load dynamically on the VI running in the RT target.
Firstly, i saved my classes in the myRIO's memory on the path /home/lvuser/natinst/LabVIEW Data/Host_Class in the directory Host_Class.
And i give to the VI "Get LV Class Default Value" this path but i had this error : 
Error 7 occurred at : Get LV Class Default

Possible reasons :

LabVIEW: (Hex 0x7) File not found. The file may be in a different location or may have been deleted. Use the command prompt or file explorer to verify that the path is correct.
GPIB interface not existing.

LabVIEW tried to load the class this way:
/home/lvuser/natinst/LabVIEW Data/Host_Class/Accelerometer/Accelerometer.lvclass

But when i check this directory, my classes are there

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