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Error 2 gray value is undefiened

I am getting Error 2: gray value is undefiened. Line 772 when i try to Vumark-Verify on A.illustrator. How can i resolve this ?

This does not happen when i use the sample template image given but if i try to create a new view mark with and image , this happens

SAME problem here!

(still occuring??)

 

Could you please fix that issue? 

I am not able to create VuMark without your advice!!

 

 

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