valid indexes on originalExtension if it is declared to be 21 elements would be 0-20. by writing the null in the 21 element you are writing it off the end of the buffer (which explains the stack error).
valid indexes on originalExtension if it is declared to be 21 elements would be 0-20. by writing the null in the 21 element you are writing it off the end of the buffer (which explains the stack error).