Null values Errors in pdf Extraction to excel

i have 10 pdf Files but some pdf files Label has NO Value empty.
while extracting Data from PDF To Excel i am getting Errors .because no value is there.
how to handle this type of Isuues ?
can any one help me anout this.

@Anand_Designer Use that kind of activities inside try catch activity. In catch activity set necessary value to that variable when error that occurs. when that error occurs each time what ever value set or any other actions you placed will executed. So process will not be stopped even though error occurs.

For any kind of errors you use try catch activity to continue execution with next transaction in case of error happens in that particular transaction.