How to use card view extension?

Actually i am having problem on the next screen after clicking on any particular image
When any image is clicked then it should appear on next screen & after that on next screen if i press the next button then the image present on that should change but it is not happening.You can see in the image i have used a procedure called next but an error is showing please check it and tell me the blocks

Here you go
Screen1


Screen2

/Boban

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Thank you so much Boban.Let me try this code.

Thank you thank you thank you so much Boban for helping me.I don’t have any idea of my happiness finally you did it Boban.I am very thankful to you.:kissing_heart::kissing_heart::kissing_heart::kissing_heart:

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