I have requirement where user imports  file data in to data type which was delegated to User in dash board portal and I need to Audit that action like User <name> imported file for every delegated data type. 

I have come across pyPostImportBatchProcessing activity which is available to use it and getting called after import completion. Written History-Add method in to Activity by creating a page defined in data class. But it is throwing exception error where instance is not valid /not able to open/ empty one.

Please provide suggestions ASAP. Thank you in advance.