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VenkateshVenkatesh 

malformed json exception.expected [ in salesforce at the begning of the list/set

I am getting this error at the time of running test class at the below line .

ProducList = (List<jsonvalue>) System.JSON.deserialize(ProductDetails , List<jsonvalue>.class);

ProducList is the value for pageblocktable.any help can be appreciable.Thank you.