Using Envelope for protection Visual FoxPro program

I was used envelope from LDK 7.4 for protect Microsoft VisualFoxpro 9.0 SP2 exe file.

I received messages:

0006   2016-09-13 11:57:34   Windows - Starting Protection Process - C:/Users/Public/Documents/oper_vok.exe
0007   2016-09-13 11:57:34   The file contains unknown extender data. It will be removed (872)
0008   2016-09-13 11:57:38   Windows - Finished Protection Process - C:\Users\Programmer\Documents\SafeNet\Sentinel LDK 7.4\VendorTools\VendorSuite\Protected\oper_vok.exe

Message 0007: The file contains unknown extender data. It will be removed (872)

What mean this message ? Will be fullfunction my protected program after such message?

Help me please.

Alexander