Null pointer exception error while excel import

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Hi everyone, I am Getting this error while i was trying to import my excel file into my application. For reference i have attached the screenshot below.     Any help would be appreciated, Thanks in advance.
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1 answers
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Update modelrelflection and check all your attributes. You probably renamed an attribute.

 

To make this easy adapt the excel template and add a column with the connected attribute. The empty one is probably the cause.

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